diff --git a/application/controllers/Config.php b/application/controllers/Config.php
index 61b4f7da4..6d0d1a994 100644
--- a/application/controllers/Config.php
+++ b/application/controllers/Config.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 require_once("Secure_Controller.php");
 
diff --git a/application/controllers/Home.php b/application/controllers/Home.php
index a2b812dfa..87c1df243 100644
--- a/application/controllers/Home.php
+++ b/application/controllers/Home.php
@@ -4,11 +4,6 @@ require_once("Secure_Controller.php");
 
 class Home extends Secure_Controller 
 {
-	public function __construct()
-	{
-		parent::__construct();	
-	}
-
 	public function index()
 	{
 		$this->load->view('home');
@@ -21,4 +16,4 @@ class Home extends Secure_Controller
 		$this->Employee->logout();
 	}
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/controllers/Login.php b/application/controllers/Login.php
index 46a5e4764..cb883b4e2 100644
--- a/application/controllers/Login.php
+++ b/application/controllers/Login.php
@@ -2,11 +2,6 @@
 
 class Login extends CI_Controller 
 {
-	public function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function index()
 	{
 		if($this->Employee->is_logged_in())
diff --git a/application/controllers/Migrate.php b/application/controllers/Migrate.php
index ad3452316..70c3bf2ff 100644
--- a/application/controllers/Migrate.php
+++ b/application/controllers/Migrate.php
@@ -1,17 +1,17 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 require_once("Secure_Controller.php");
 
-class Migrate extends Secure_Controller {
-
+class Migrate extends Secure_Controller
+{
 	public function __construct()
 	{
 		parent::__construct('migrate');
 
 		$this->load->library('migration');
 	}
-	public function index()
 
+	public function index()
 	{
 		$this->load->view('migrate/manage');
 	}
@@ -20,15 +20,12 @@ class Migrate extends Secure_Controller {
 	{
 		if( ! $this->migration->latest())
 		{
-			echo json_encode(array('success' => FALSE, 'message' => $this->lang->line('migrate_failed - '.$this->migration->error_string())));
+			echo json_encode(array('success' => FALSE, 'message' => $this->lang->line('migrate_failed - ' . $this->migration->error_string())));
 		}
 		else
 		{
 			echo json_encode(array('success' => TRUE, 'message' => $this->lang->line('migrate_success')));
 		}
 	}
-
 }
-
 ?>
-
diff --git a/application/controllers/No_access.php b/application/controllers/No_access.php
index d8efeea69..9a2a306bb 100644
--- a/application/controllers/No_access.php
+++ b/application/controllers/No_access.php
@@ -2,11 +2,6 @@
 
 class No_Access extends CI_Controller 
 {
-	public function __construct()
-	{
-		parent::__construct();
-	}
-	
 	public function index($module_id = '', $permission_id = '')
 	{
 		$data['module_name']   = $this->Module->get_module_name($module_id);
@@ -17,4 +12,4 @@ class No_Access extends CI_Controller
 		$this->load->view('no_access', $data);
 	}
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/core/MY_Lang.php b/application/core/MY_Lang.php
index 5b82d84b0..b04738367 100644
--- a/application/core/MY_Lang.php
+++ b/application/core/MY_Lang.php
@@ -1,12 +1,7 @@
-<?php (defined('BASEPATH')) OR exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 class MY_Lang extends CI_Lang
 {
-	public function __construct()
-	{
-		parent::__construct();
-	}
-
     public function switch_to($idiom)
     {
         $CI =& get_instance();
diff --git a/application/helpers/dompdf_helper.php b/application/helpers/dompdf_helper.php
index e88a69a07..8c361fc45 100644
--- a/application/helpers/dompdf_helper.php
+++ b/application/helpers/dompdf_helper.php
@@ -1,6 +1,6 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
-function pdf_create($html, $filename = '') 
+function pdf_create($html, $filename = '')
 {
     // need to enable magic quotes for the
     $magic_quotes_enabled = get_magic_quotes_runtime();
@@ -28,4 +28,4 @@ function pdf_create($html, $filename = '')
         return $dompdf->output();
     }
 }
-?>  
\ No newline at end of file
+?>
diff --git a/application/helpers/locale_helper.php b/application/helpers/locale_helper.php
index 3c98d06fb..0a39aa985 100644
--- a/application/helpers/locale_helper.php
+++ b/application/helpers/locale_helper.php
@@ -1,7 +1,7 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
-/*
- * Currency locale
+/**
+ * Currency locale helper
  */
 
 function current_language_code()
@@ -52,7 +52,7 @@ function to_tax_decimals($number)
     {
         return $number;
     }
-	
+
     return to_decimals($number, 'tax_decimals');
 }
 
@@ -69,7 +69,7 @@ function to_decimals($number, $decimals, $type=\NumberFormatter::DECIMAL)
     {
         return $number;
     }
-	
+
     $config = get_instance()->config;
     $fmt = new \NumberFormatter($config->item('number_locale'), $type);
     $fmt->setAttribute(\NumberFormatter::MIN_FRACTION_DIGITS, $config->item($decimals));
diff --git a/application/helpers/report_helper.php b/application/helpers/report_helper.php
index 473e60213..ce5fc3850 100644
--- a/application/helpers/report_helper.php
+++ b/application/helpers/report_helper.php
@@ -1,10 +1,10 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 function show_report_if_allowed($report_prefix, $report_name, $person_id, $permission_id = '')
 {
 	$CI =& get_instance();
 
-	$permission_id = empty($permission_id) ? 'reports_' . $report_name : $permission_id;	
+	$permission_id = empty($permission_id) ? 'reports_' . $report_name : $permission_id;
 	if($CI->Employee->has_grant($permission_id, $person_id))
 	{
 		show_report($report_prefix, $report_name, $permission_id);
@@ -23,8 +23,7 @@ function show_report($report_prefix, $report_name, $lang_key='')
 	{
 		?>
 			<a class="list-group-item" href="<?php echo site_url('reports/' . $report_prefix . preg_replace('/reports_(.*)/', '$1', $report_name));?>"><?php echo $report_label; ?></a>
-		<?php 
+		<?php
 	}
 }
-
-?>
\ No newline at end of file
+?>
diff --git a/application/helpers/table_helper.php b/application/helpers/table_helper.php
index e881a7c05..060cf8e3d 100644
--- a/application/helpers/table_helper.php
+++ b/application/helpers/table_helper.php
@@ -1,4 +1,4 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 function get_sales_manage_table_headers()
 {
@@ -13,7 +13,7 @@ function get_sales_manage_table_headers()
 		array('change_due' => $CI->lang->line('sales_change_due')),
 		array('payment_type' => $CI->lang->line('sales_payment_type'))
 	);
-	
+
 	if($CI->config->item('invoice_enable') == TRUE)
 	{
 		$headers[] = array('invoice_number' => $CI->lang->line('sales_invoice_number'));
@@ -170,7 +170,7 @@ function get_people_manage_table_headers()
 	{
 		$headers[] = array('messages' => '', 'sortable' => FALSE);
 	}
-	
+
 	return transform_headers($headers);
 }
 
@@ -185,7 +185,7 @@ function get_person_data_row($person, $controller)
 		'first_name' => $person->first_name,
 		'email' => empty($person->email) ? '' : mailto($person->email, $person->email),
 		'phone_number' => $person->phone_number,
-		'messages' => empty($person->phone_number) ? '' : anchor("Messages/view/$person->person_id", '<span class="glyphicon glyphicon-phone"></span>', 
+		'messages' => empty($person->phone_number) ? '' : anchor("Messages/view/$person->person_id", '<span class="glyphicon glyphicon-phone"></span>',
 			array('class'=>'modal-dlg', 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line('messages_sms_send'))),
 		'edit' => anchor($controller_name."/view/$person->person_id", '<span class="glyphicon glyphicon-edit"></span>',
 			array('class'=>'modal-dlg', 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line($controller_name.'_update'))
@@ -209,7 +209,7 @@ function get_customer_manage_table_headers()
 	{
 		$headers[] = array('messages' => '', 'sortable' => FALSE);
 	}
-	
+
 	return transform_headers($headers);
 }
 
@@ -225,7 +225,7 @@ function get_customer_data_row($person, $stats, $controller)
 		'email' => empty($person->email) ? '' : mailto($person->email, $person->email),
 		'phone_number' => $person->phone_number,
 		'total' => to_currency($stats->total),
-		'messages' => empty($person->phone_number) ? '' : anchor("Messages/view/$person->person_id", '<span class="glyphicon glyphicon-phone"></span>', 
+		'messages' => empty($person->phone_number) ? '' : anchor("Messages/view/$person->person_id", '<span class="glyphicon glyphicon-phone"></span>',
 			array('class'=>'modal-dlg', 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line('messages_sms_send'))),
 		'edit' => anchor($controller_name."/view/$person->person_id", '<span class="glyphicon glyphicon-edit"></span>',
 			array('class'=>'modal-dlg', 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line($controller_name.'_update'))
@@ -267,7 +267,7 @@ function get_supplier_data_row($supplier, $controller)
 		'first_name' => $supplier->first_name,
 		'email' => empty($supplier->email) ? '' : mailto($supplier->email, $supplier->email),
 		'phone_number' => $supplier->phone_number,
-		'messages' => empty($supplier->phone_number) ? '' : anchor("Messages/view/$supplier->person_id", '<span class="glyphicon glyphicon-phone"></span>', 
+		'messages' => empty($supplier->phone_number) ? '' : anchor("Messages/view/$supplier->person_id", '<span class="glyphicon glyphicon-phone"></span>',
 			array('class'=>"modal-dlg", 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line('messages_sms_send'))),
 		'edit' => anchor($controller_name."/view/$supplier->person_id", '<span class="glyphicon glyphicon-edit"></span>',
 			array('class'=>"modal-dlg", 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line($controller_name.'_update')))
@@ -450,5 +450,4 @@ function get_item_kit_data_row($item_kit, $controller)
 			array('class'=>'modal-dlg', 'data-btn-submit' => $CI->lang->line('common_submit'), 'title'=>$CI->lang->line($controller_name.'_update'))
 		));
 }
-
 ?>
diff --git a/application/libraries/Barcode_lib.php b/application/libraries/Barcode_lib.php
index 153c61d8e..afe72fbeb 100644
--- a/application/libraries/Barcode_lib.php
+++ b/application/libraries/Barcode_lib.php
@@ -7,21 +7,31 @@ require APPPATH.'/views/barcodes/Code128.php';
 require APPPATH.'/views/barcodes/Ean13.php';
 require APPPATH.'/views/barcodes/Ean8.php';
 
+/**
+ * Barcode library
+ *
+ * Library with utilities to manage barcodes
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   2.x
+ * @author  Jekkos
+ */
+
 class Barcode_lib
 {
 	private $CI;
 	private $supported_barcodes = array('Code39' => 'Code 39', 'Code128' => 'Code 128', 'Ean8' => 'EAN 8', 'Ean13' => 'EAN 13');
-	
+
 	public function __construct()
 	{
 		$this->CI =& get_instance();
 	}
-	
+
 	public function get_list_barcodes()
 	{
 		return $this->supported_barcodes;
 	}
-	
+
 	public function get_barcode_config()
 	{
 		$data['company'] = $this->CI->config->item('company');
@@ -36,10 +46,10 @@ class Barcode_lib
 		$data['barcode_second_row'] = $this->CI->config->item('barcode_second_row');
 		$data['barcode_third_row'] = $this->CI->config->item('barcode_third_row');
 		$data['barcode_num_in_row'] = $this->CI->config->item('barcode_num_in_row');
-		$data['barcode_page_width'] = $this->CI->config->item('barcode_page_width');	  
+		$data['barcode_page_width'] = $this->CI->config->item('barcode_page_width');
 		$data['barcode_page_cellspacing'] = $this->CI->config->item('barcode_page_cellspacing');
 		$data['barcode_generate_if_empty'] = $this->CI->config->item('barcode_generate_if_empty');
-		
+
 		return $data;
 	}
 
@@ -73,16 +83,16 @@ class Barcode_lib
 			case 'Code39':
 				return new emberlabs\Barcode\Code39();
 				break;
-				
+
 			case 'Code128':
 			default:
 				return new emberlabs\Barcode\Code128();
 				break;
-				
+
 			case 'Ean8':
 				return new emberlabs\Barcode\Ean8();
 				break;
-				
+
 			case 'Ean13':
 				return new emberlabs\Barcode\Ean13();
 				break;
@@ -121,12 +131,12 @@ class Barcode_lib
 			$barcode_instance->setDimensions($barcode_config['barcode_width'], $barcode_config['barcode_height']);
 
 			$barcode_instance->draw();
-			
+
 			return $barcode_instance->base64();
-		} 
+		}
 		catch(Exception $e)
 		{
-			echo 'Caught exception: ', $e->getMessage(), "\n";		
+			echo 'Caught exception: ', $e->getMessage(), "\n";
 		}
 	}
 
@@ -139,24 +149,24 @@ class Barcode_lib
 
 			// set the receipt number to generate the barcode for
 			$barcode->setData($barcode_content);
-			
+
 			// image quality 100
 			$barcode->setQuality(100);
-			
+
 			// width: 200, height: 30
 			$barcode->setDimensions(200, 30);
 
 			// draw the image
 			$barcode->draw();
-			
+
 			return $barcode->base64();
-		} 
+		}
 		catch(Exception $e)
 		{
-			echo 'Caught exception: ', $e->getMessage(), "\n";		
+			echo 'Caught exception: ', $e->getMessage(), "\n";
 		}
 	}
-	
+
 	public function display_barcode($item, $barcode_config)
 	{
 		$display_table = "<table>";
@@ -166,14 +176,14 @@ class Barcode_lib
 		$display_table .= "<tr><td align='center'>" . $this->manage_display_layout($barcode_config['barcode_second_row'], $item, $barcode_config) . "</td></tr>";
 		$display_table .= "<tr><td align='center'>" . $this->manage_display_layout($barcode_config['barcode_third_row'], $item, $barcode_config) . "</td></tr>";
 		$display_table .= "</table>";
-		
+
 		return $display_table;
 	}
-	
+
 	private function manage_display_layout($layout_type, $item, $barcode_config)
 	{
 		$result = '';
-		
+
 		if($layout_type == 'name')
 		{
 			$result = $this->CI->lang->line('items_name') . " " . $item['name'];
@@ -201,8 +211,8 @@ class Barcode_lib
 
 		return character_limiter($result, 40);
 	}
-	
-	public function listfonts($folder) 
+
+	public function listfonts($folder)
 	{
 		$array = array();
 
diff --git a/application/libraries/Email_lib.php b/application/libraries/Email_lib.php
index 2a8050391..d4c11b007 100644
--- a/application/libraries/Email_lib.php
+++ b/application/libraries/Email_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
- 
+
+/**
+ * Email library
+ *
+ * Library with utilities to configure and send emails
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.0
+ * @author  daN4cat (FrancescoUK)
+ */
+
 class Email_lib
 {
 	private $CI;
@@ -7,7 +17,7 @@ class Email_lib
   	public function __construct()
 	{
 		$this->CI =& get_instance();
-		
+
 		$this->CI->load->library('email');
 
 		$config = array(
@@ -23,34 +33,34 @@ class Email_lib
 			'smtp_timeout' => $this->CI->config->item('smtp_timeout'),
 			'smtp_crypto' => $this->CI->config->item('smtp_crypto')
 		);
-		
+
 		$this->CI->email->initialize($config);
 	}
-	
-	/*
+
+	/**
 	 * Email sending function
 	 * Example of use: $response = sendEmail('john@doe.com', 'Hello', 'This is a message', $filename);
 	 */
 	public function sendEmail($to, $subject, $message, $attachment = NULL)
 	{
 		$email = $this->CI->email;
-		
+
 		$email->from($this->CI->config->item('email'), $this->CI->config->item('company'));
 		$email->to($to);
 		$email->subject($subject);
 		$email->message($message);
-		if( !empty($attachment) )
+		if(!empty($attachment))
 		{
 			$email->attach($attachment);
 		}
 
 		$result = $email->send();
-		
+
 		if(!$result)
 		{
 			error_log($email->print_debugger());
 		}
-		
+
 		return $result;
 	}
 }
diff --git a/application/libraries/Item_lib.php b/application/libraries/Item_lib.php
index 4ed53ec14..2ccb310b9 100644
--- a/application/libraries/Item_lib.php
+++ b/application/libraries/Item_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
+/**
+ * Item library
+ *
+ * Library with utilities to manage items
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   2.x
+ * @author  Jekkos
+ */
+
 class Item_lib
 {
 	private $CI;
@@ -28,7 +38,7 @@ class Item_lib
 	public function clear_item_location()
 	{
 		$this->CI->session->unset_userdata('item_location');
-	}	
+	}
 }
 
 ?>
diff --git a/application/libraries/Mailchimp_lib.php b/application/libraries/Mailchimp_lib.php
index 3dc39c443..e3f9011c5 100644
--- a/application/libraries/Mailchimp_lib.php
+++ b/application/libraries/Mailchimp_lib.php
@@ -2,9 +2,13 @@
 
 /**
  * MailChimp API v3 REST client Connector
- * 
+ *
  * Interface for communicating with the Mailchimp v3 API
  *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  daN4cat (FrancescoUK)
+ *
  * Inspired by the work of:
  *   - Rajitha Bandara: https://github.com/rajitha-bandara/ci-mailchimp-v3-rest-client
  *   - Stefan Ashwell: https://github.com/stef686/codeigniter-mailchimp-api-v3
@@ -66,7 +70,7 @@ class MailchimpConnector
 		{
 			return $this->_request($httpVerb, $method, $args);
 		}
-		
+
 		return FALSE;
 	}
 
@@ -88,13 +92,13 @@ class MailchimpConnector
 	}
 
     /**
-     * Performs the underlying HTTP request. 
+     * Performs the underlying HTTP request.
      * @param  string $httpVerb The HTTP method to be used
      * @param  string $method   The API method to be called
      * @param  array  $args     Assoc array of parameters to be passed
      * @return array            Assoc array of decoded result
      */
-	private function _request($httpVerb, $method, $args = array()) 
+	private function _request($httpVerb, $method, $args = array())
 	{
 		$result = FALSE;
 
@@ -123,9 +127,13 @@ class MailchimpConnector
 
 /**
  * Mailchimp library, usable from CI code
- * 
+ *
  * Library with utility queries to interface Mailchimp v3 API
  *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  daN4cat (FrancescoUK)
+ *
  * Inspired by the work of ThinkShout: https://github.com/thinkshout/mailchimp-api-php
  */
 
@@ -138,7 +146,7 @@ class Mailchimp_lib
 		$api_key = (count($params) > 0 && !empty($params['api_key'])) ? $params['api_key'] : '';
 		$this->_connector = new MailchimpConnector($api_key);
 	}
-	
+
 	/**
 	* Gets information about all lists owned by the authenticated account.
 	*
@@ -191,7 +199,7 @@ class Mailchimp_lib
 			'count' => $count,
 			'offset' => $offset
 		];
-		
+
 		return $this->_connector->call('GET', '/lists/' . $list_id . '/members', $parameters);
 	}
 
@@ -354,4 +362,4 @@ class Mailchimp_lib
 	}
 }
 
-?>
\ No newline at end of file
+?>
diff --git a/application/libraries/Receiving_lib.php b/application/libraries/Receiving_lib.php
index 80a8c47b9..fc7adc157 100644
--- a/application/libraries/Receiving_lib.php
+++ b/application/libraries/Receiving_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
+/**
+ * Receiving library
+ *
+ * Library with utilities to manage receivings
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Receiving_lib
 {
 	private $CI;
diff --git a/application/libraries/Sale_lib.php b/application/libraries/Sale_lib.php
index 1975cec84..da4ed4d5b 100644
--- a/application/libraries/Sale_lib.php
+++ b/application/libraries/Sale_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
+/**
+ * Sale library
+ *
+ * Library with utilities to manage sales
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Sale_lib
 {
 	private $CI;
@@ -9,7 +19,6 @@ class Sale_lib
 		$this->CI =& get_instance();
 		$this->CI->load->library('tax_lib');
 		$this->CI->load->model('enums/Rounding_code');
-
 	}
 
 	public function get_line_sequence_options()
@@ -114,8 +123,8 @@ class Sale_lib
 	{
 		$this->CI->session->unset_userdata('sales_cart');
 	}
-	
-	public function get_comment() 
+
+	public function get_comment()
 	{
 		// avoid returning a NULL that results in a 0 in the comment if nothing is set/available
 		$comment = $this->CI->session->userdata('sales_comment');
@@ -123,16 +132,16 @@ class Sale_lib
 		return empty($comment) ? '' : $comment;
 	}
 
-	public function set_comment($comment) 
+	public function set_comment($comment)
 	{
 		$this->CI->session->set_userdata('sales_comment', $comment);
 	}
 
-	public function clear_comment() 	
+	public function clear_comment()
 	{
 		$this->CI->session->unset_userdata('sales_comment');
 	}
-	
+
 	public function get_invoice_number()
 	{
 		return $this->CI->session->userdata('sales_invoice_number');
@@ -203,29 +212,29 @@ class Sale_lib
 	{
 		return $this->CI->session->set_userdata('sales_invoice_number_enabled', $invoice_number_enabled);
 	}
-	
-	public function is_print_after_sale() 
+
+	public function is_print_after_sale()
 	{
 		return ($this->CI->session->userdata('sales_print_after_sale') == 'true' ||
 				$this->CI->session->userdata('sales_print_after_sale') == '1');
 	}
-	
+
 	public function set_print_after_sale($print_after_sale)
 	{
 		return $this->CI->session->set_userdata('sales_print_after_sale', $print_after_sale);
 	}
-	
-	public function get_email_receipt() 
+
+	public function get_email_receipt()
 	{
 		return $this->CI->session->userdata('sales_email_receipt');
 	}
 
-	public function set_email_receipt($email_receipt) 
+	public function set_email_receipt($email_receipt)
 	{
 		$this->CI->session->set_userdata('sales_email_receipt', $email_receipt);
 	}
 
-	public function clear_email_receipt() 	
+	public function clear_email_receipt()
 	{
 		$this->CI->session->unset_userdata('sales_email_receipt');
 	}
@@ -260,7 +269,7 @@ class Sale_lib
 		{
 			//add to existing array
 			$payment = array($payment_id => array('payment_type' => $payment_id, 'payment_amount' => $payment_amount));
-			
+
 			$payments += $payment;
 		}
 
@@ -459,7 +468,7 @@ class Sale_lib
 	{
 		$this->CI->session->unset_userdata('sales_customer');
 	}
-	
+
 	public function get_employee()
 	{
 		if(!$this->CI->session->userdata('sales_employee'))
@@ -593,7 +602,7 @@ class Sale_lib
 	{
 		$item_info = $this->CI->Item->get_info_by_id_or_number($item_id);
 
-		//make sure item exists		
+		//make sure item exists
 		if(empty($item_info))
 		{
 			$item_id = -1;
@@ -707,10 +716,10 @@ class Sale_lib
 
 		return TRUE;
 	}
-	
+
 	public function out_of_stock($item_id, $item_location)
 	{
-		//make sure item exists		
+		//make sure item exists
 		if($item_id != -1)
 		{
 			$item_info = $this->CI->Item->get_info_by_id_or_number($item_id);
@@ -733,7 +742,7 @@ class Sale_lib
 
 		return '';
 	}
-	
+
 	public function get_quantity_already_added($item_id, $item_location)
 	{
 		$items = $this->get_cart();
@@ -745,10 +754,10 @@ class Sale_lib
 				$quanity_already_added+=$item['quantity'];
 			}
 		}
-		
+
 		return $quanity_already_added;
 	}
-	
+
 	public function get_item_id($line_to_get)
 	{
 		$items = $this->get_cart();
@@ -760,14 +769,14 @@ class Sale_lib
 				return $item['item_id'];
 			}
 		}
-		
+
 		return -1;
 	}
 
 	public function edit_item($line, $description, $serialnumber, $quantity, $discount, $price)
 	{
 		$items = $this->get_cart();
-		if(isset($items[$line]))	
+		if(isset($items[$line]))
 		{
 			$line = &$items[$line];
 			$line['description'] = $description;
@@ -806,7 +815,7 @@ class Sale_lib
 
 		$this->set_customer($this->CI->Sale->get_customer($sale_id)->person_id);
 	}
-	
+
 	public function add_item_kit($external_item_kit_id, $item_location, $discount, $price_option, $kit_print_option, &$stock_warning)
 	{
 		//KIT #
@@ -856,7 +865,7 @@ class Sale_lib
 				$stock_warning = $this->out_of_stock($item_kit_item['item_id'], $item_location);
 			}
 		}
-		
+
 		return $result;
 	}
 
@@ -893,7 +902,7 @@ class Sale_lib
 
 		return $this->CI->session->userdata('sales_cart');
 	}
-	
+
 	public function copy_entire_suspended_sale($sale_id)
 	{
 		$this->empty_cart();
@@ -987,12 +996,12 @@ class Sale_lib
 		}
 		$this->CI->session->set_userdata('cash_rounding', $cash_rounding);
 	}
-	
+
 	public function is_customer_taxable()
 	{
 		$customer_id = $this->get_customer();
 		$customer = $this->CI->Customer->get_info($customer_id);
-		
+
 		//Do not charge sales tax if we have a customer that is not taxable
 		return $customer->taxable or $customer_id == -1;
 	}
@@ -1061,10 +1070,10 @@ class Sale_lib
 	}
 
 	public function apply_customer_discount($discount_percent)
-	{	
+	{
 		// Get all items in the cart so far...
 		$items = $this->get_cart();
-		
+
 		foreach($items as &$item)
 		{
 			$quantity = $item['quantity'];
@@ -1081,7 +1090,7 @@ class Sale_lib
 
 		$this->set_cart($items);
 	}
-	
+
 	public function get_discount()
 	{
 		$discount = 0;
@@ -1101,8 +1110,8 @@ class Sale_lib
 	{
 		return $this->calculate_subtotal($include_discount, $exclude_tax);
 	}
-	
-	public function get_item_total_tax_exclusive($item_id, $quantity, $price, $discount_percentage, $include_discount = FALSE) 
+
+	public function get_item_total_tax_exclusive($item_id, $quantity, $price, $discount_percentage, $include_discount = FALSE)
 	{
 		$tax_info = $this->CI->Item_taxes->get_info($item_id);
 		$item_total = $this->get_item_total($quantity, $price, $discount_percentage, $include_discount);
@@ -1112,7 +1121,7 @@ class Sale_lib
 			$tax_percentage = $tax['percent'];
 			$item_total = bcsub($item_total, $this->get_item_tax($quantity, $price, $discount_percentage, $tax_percentage));
 		}
-		
+
 		return $item_total;
 	}
 
@@ -1128,7 +1137,7 @@ class Sale_lib
 
 		return $discounted_extended_amount;
 	}
-	public function get_item_total($quantity, $price, $discount_percentage, $include_discount = FALSE)  
+	public function get_item_total($quantity, $price, $discount_percentage, $include_discount = FALSE)
 	{
 		$total = bcmul($quantity, $price);
 		if($include_discount)
@@ -1154,8 +1163,8 @@ class Sale_lib
 
 		return bcmul($total, $discount_fraction);
 	}
-	
-	public function get_item_tax($quantity, $price, $discount_percentage, $tax_percentage) 
+
+	public function get_item_tax($quantity, $price, $discount_percentage, $tax_percentage)
 	{
 		$price = $this->get_item_total($quantity, $price, $discount_percentage, TRUE);
 		if($this->CI->config->item('tax_included'))
@@ -1180,7 +1189,7 @@ class Sale_lib
 			{
 				$subtotal = bcadd($subtotal, $this->get_item_total_tax_exclusive($item['item_id'], $item['quantity'], $item['price'], $item['discount'], $include_discount));
 			}
-			else 
+			else
 			{
 				$subtotal = bcadd($subtotal, $this->get_item_total($item['quantity'], $item['price'], $item['discount'], $include_discount));
 			}
@@ -1210,7 +1219,7 @@ class Sale_lib
 
     public function get_empty_tables()
     {
-    	return $this->CI->Dinner_table->get_empty_tables();		
+    	return $this->CI->Dinner_table->get_empty_tables();
     }
 
 	public function check_for_cash_rounding($total)
diff --git a/application/libraries/Sms_lib.php b/application/libraries/Sms_lib.php
index 8f1bbbea0..e56cebd63 100644
--- a/application/libraries/Sms_lib.php
+++ b/application/libraries/Sms_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
- 
+
+/**
+ * SMS library
+ *
+ * Library with utilities to send texts via SMS Gateway (requires proxy implementation)
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.0
+ * @author  RamkrishnaMondal, daN4cat (FrancescoUK)
+ */
+
 class Sms_lib
 {
 	private $CI;
@@ -8,7 +18,7 @@ class Sms_lib
 	{
 		$this->CI =& get_instance();
 	}
-	
+
 	/*
 	 * SMS sending function
 	 * Example of use: $response = sendSMS('4477777777', 'My test message');
@@ -18,34 +28,34 @@ class Sms_lib
 		$username   = $this->CI->config->item('msg_uid');
 		$password   = $this->CI->encryption->decrypt($this->CI->config->item('msg_pwd'));
 		$originator = $this->CI->config->item('msg_src');
-		
+
 		$response = FALSE;
-		
+
 		// if any of the parameters is empty return with a FALSE
 		if(empty($username) || empty($password) || empty($phone) || empty($message) || empty($originator))
 		{
 			//echo $username . ' ' . $password . ' ' . $phone . ' ' . $message . ' ' . $originator;
 		}
 		else
-		{	
+		{
 			$response = TRUE;
-			
+
 			// make sure passed string is url encoded
 			$message = rawurlencode($message);
-			
+
 			// add call to send a message via 3rd party API here
 			// Some examples
 
 			/*
 			$url = "http://xxx.xxx.xxx.xxx/send_sms?username=$username&password=$password&src=$originator&dst=$phone&msg=$message&dr=1";
-			 
-			$c = curl_init(); 
-			curl_setopt($c, CURLOPT_RETURNTRANSFER, 1); 
-			curl_setopt($c, CURLOPT_URL, $url); 
-			$response = curl_exec($c); 
+
+			$c = curl_init();
+			curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
+			curl_setopt($c, CURLOPT_URL, $url);
+			$response = curl_exec($c);
 			curl_close($c);
 			*/
-			
+
 			// This is a textmarketer.co.uk API call, see: http://wiki.textmarketer.co.uk/display/DevDoc/Text+Marketer+Developer+Documentation+-+Wiki+Home
 			/*
 			$url = 'https://api.textmarketer.co.uk/gateway/'."?username=$username&password=$password&option=xml";
diff --git a/application/libraries/Tax_lib.php b/application/libraries/Tax_lib.php
index 994c3e967..df417ab8a 100644
--- a/application/libraries/Tax_lib.php
+++ b/application/libraries/Tax_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
+/**
+ * Tax library
+ *
+ * Library with utilities to manage taxes
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
+
 class Tax_lib
 {
 	const TAX_TYPE_SALES = 1;
@@ -310,11 +320,11 @@ class Tax_lib
 		return $tax_code;
 	}
 
-	function clean($string) {
+	public function clean($string)
+	{
 		$string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens.
 
 		return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
 	}
-
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/libraries/Token_lib.php b/application/libraries/Token_lib.php
index ef423e5d0..09a2de052 100644
--- a/application/libraries/Token_lib.php
+++ b/application/libraries/Token_lib.php
@@ -2,6 +2,16 @@
 
 require_once(APPPATH . 'libraries/tokens/Token.php');
 
+/**
+ * Token library
+ *
+ * Library with utilities to manage tokens
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
+
 class Token_lib
 {
 	private $CI;
diff --git a/application/libraries/Tracking_lib.php b/application/libraries/Tracking_lib.php
index 6aeb4a289..17a01a895 100644
--- a/application/libraries/Tracking_lib.php
+++ b/application/libraries/Tracking_lib.php
@@ -1,5 +1,15 @@
 <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
+/**
+ * Tracking library
+ *
+ * Library with utilities to manage statistics
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.0
+ * @author  daN4cat (FrancescoUK)
+ */
+
 class Tracking_lib
 {
 	private $CI;
@@ -43,7 +53,7 @@ class Tracking_lib
 			$this->CI->Appconfig->batch_save(array('client_id' => $clientId));
 		}
 	}
-	
+
 	/*
 	 * Track Event function
 	 */
@@ -66,7 +76,7 @@ class Tracking_lib
 			error_log($e->getMessage());
 		}
 	}
-	
+
 	/*
 	 * Track Page function
 	 */
diff --git a/application/libraries/tokens/Token.php b/application/libraries/tokens/Token.php
index b11522aad..f4700fa04 100644
--- a/application/libraries/tokens/Token.php
+++ b/application/libraries/tokens/Token.php
@@ -1,4 +1,4 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 
 require_once(APPPATH . 'libraries/tokens/Token.php');
 require_once(APPPATH . 'libraries/tokens/Token_customer.php');
@@ -8,9 +8,17 @@ require_once(APPPATH . 'libraries/tokens/Token_quote_sequence.php');
 require_once(APPPATH . 'libraries/tokens/Token_suspended_invoice_count.php');
 require_once(APPPATH . 'libraries/tokens/Token_year_invoice_count.php');
 
+/**
+ * Token class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
+
 class Token
 {
-	private $CI;
+	protected $CI;
 
 	public function __construct()
 	{
@@ -50,9 +58,9 @@ class Token
 		return '';
 	}
 
-	function get_value(){
+	public function get_value()
+	{
 		return '';
 	}
 }
-
-?>
\ No newline at end of file
+?>
diff --git a/application/libraries/tokens/Token_customer.php b/application/libraries/tokens/Token_customer.php
index 99688ef4f..46a222b3d 100644
--- a/application/libraries/tokens/Token_customer.php
+++ b/application/libraries/tokens/Token_customer.php
@@ -1,13 +1,19 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_customer class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_customer extends Token
 {
-	private $CI;
-
 	public function __construct()
 	{
 		parent::__construct();
-		$this->CI =& get_instance();
+
 		$this->CI->load->library('sale_lib');
 	}
 
@@ -25,7 +31,6 @@ class Token_customer extends Token
 		}
 
 		return '';
-
 	}
-
-}
\ No newline at end of file
+}
+?>
diff --git a/application/libraries/tokens/Token_invoice_count.php b/application/libraries/tokens/Token_invoice_count.php
index c3b9ab1fe..a6b592058 100644
--- a/application/libraries/tokens/Token_invoice_count.php
+++ b/application/libraries/tokens/Token_invoice_count.php
@@ -1,13 +1,19 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_invoice_count class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_invoice_count extends Token
 {
-	private $CI;
-
 	public function __construct()
 	{
 		parent::__construct();
-		$this->CI =& get_instance();
+
 		$this->CI->load->model('Sale');
 	}
 
@@ -15,4 +21,5 @@ class Token_invoice_count extends Token
 	{
 		return $this->CI->Sale->get_invoice_count();
 	}
-}
\ No newline at end of file
+}
+?>
diff --git a/application/libraries/tokens/Token_invoice_sequence.php b/application/libraries/tokens/Token_invoice_sequence.php
index cdae5cdbb..c6a0802b1 100644
--- a/application/libraries/tokens/Token_invoice_sequence.php
+++ b/application/libraries/tokens/Token_invoice_sequence.php
@@ -1,17 +1,18 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_invoice_sequence class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_invoice_sequence extends Token
 {
-	private $CI;
-
-	public function __construct()
-	{
-		parent::__construct();
-		$this->CI =& get_instance();
-	}
-
 	public function get_value()
 	{
 		return $this->CI->Appconfig->acquire_save_next_invoice_sequence();
 	}
-}
\ No newline at end of file
+}
+?>
diff --git a/application/libraries/tokens/Token_quote_sequence.php b/application/libraries/tokens/Token_quote_sequence.php
index 7169ac695..b7cc08186 100644
--- a/application/libraries/tokens/Token_quote_sequence.php
+++ b/application/libraries/tokens/Token_quote_sequence.php
@@ -1,17 +1,18 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_quote_sequence class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_quote_sequence extends Token
 {
-	private $CI;
-
-	public function __construct()
-	{
-		parent::__construct();
-		$this->CI =& get_instance();
-	}
-
 	public function get_value()
 	{
 		return $this->CI->Appconfig->acquire_save_next_quote_sequence();
 	}
-}
\ No newline at end of file
+}
+?>
diff --git a/application/libraries/tokens/Token_suspended_invoice_count.php b/application/libraries/tokens/Token_suspended_invoice_count.php
index 2809103b4..ca3e6822a 100644
--- a/application/libraries/tokens/Token_suspended_invoice_count.php
+++ b/application/libraries/tokens/Token_suspended_invoice_count.php
@@ -1,13 +1,19 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_suspended_invoice_count class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_suspended_invoice_count extends Token
 {
-	private $CI;
-
 	public function __construct()
 	{
 		parent::__construct();
-		$this->CI =& get_instance();
+
 		$this->CI->load->model('Sale');
 	}
 
@@ -16,5 +22,4 @@ class Token_suspended_invoice_count extends Token
 		return $this->CI->Sale->get_suspended_invoice_count();
 	}
 }
-
-?>
\ No newline at end of file
+?>
diff --git a/application/libraries/tokens/Token_year_invoice_count.php b/application/libraries/tokens/Token_year_invoice_count.php
index 36a1e48eb..6e2242a3b 100644
--- a/application/libraries/tokens/Token_year_invoice_count.php
+++ b/application/libraries/tokens/Token_year_invoice_count.php
@@ -1,13 +1,19 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Token_year_invoice_count class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Token_year_invoice_count extends Token
 {
-	private $CI;
-
 	public function __construct()
 	{
 		parent::__construct();
-		$this->CI =& get_instance();
+
 		$this->CI->load->model('Sale');
 	}
 
@@ -15,4 +21,5 @@ class Token_year_invoice_count extends Token
 	{
 		return $this->CI->Sale->get_invoice_number_for_year();
 	}
-}
\ No newline at end of file
+}
+?>
diff --git a/application/migrations/20170502221506_sales_tax_data.php b/application/migrations/20170502221506_sales_tax_data.php
index c22873595..c00746171 100644
--- a/application/migrations/20170502221506_sales_tax_data.php
+++ b/application/migrations/20170502221506_sales_tax_data.php
@@ -1,21 +1,23 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 class Migration_Sales_Tax_Data extends CI_Migration
 {
-
 	public function __construct()
 	{
 		parent::__construct();
+
 		$this->load->library('tax_lib');
 		$this->load->library('sale_lib');
 		$CI =& get_instance();
-
 	}
+
 	public function up()
 	{
 		$number_of_unmigrated = $this->get_count_of_unmigrated();
+
 		error_log('Migrating sales tax history.  The number of sales that will be migrated is '.$number_of_unmigrated);
-		if ($number_of_unmigrated > 0)
+
+		if($number_of_unmigrated > 0)
 		{
 			$unmigrated_invoices = $this->get_unmigrated($number_of_unmigrated)->result_array();
 
@@ -24,6 +26,7 @@ class Migration_Sales_Tax_Data extends CI_Migration
 				$this->upgrade_tax_history_for_sale($unmigrated_invoice['sale_id']);
 			}
 		}
+
 		error_log('Migrating sales tax history.  The number of sales that will be migrated is finished.');
 	}
 
@@ -68,6 +71,7 @@ class Migration_Sales_Tax_Data extends CI_Migration
 			$this->tax_lib->update_sales_taxes($sales_taxes, $tax_type, $tax_group, $item['percent'], $tax_basis, $item_tax_amount, $tax_group_sequence, '0', $sale_id, $item['name']);
 			$tax_group_sequence += 1;
 		}
+
 		$this->tax_lib->apply_invoice_taxing($sales_taxes);
 
 		$this->save_sales_tax($sales_taxes);
@@ -75,7 +79,6 @@ class Migration_Sales_Tax_Data extends CI_Migration
 
 	private function get_unmigrated($block_count)
 	{
-
 		$this->db->select('SIT.sale_id');
 		$this->db->select('ST.sale_id as sales_taxes_sale_id');
 		$this->db->from('sales_items_taxes as SIT');
@@ -85,10 +88,8 @@ class Migration_Sales_Tax_Data extends CI_Migration
 		$this->db->group_by('ST.sale_id');
 		$this->db->order_by('SIT.sale_id');
 		$this->db->limit($block_count);
-		$query = $this->db->get();
-
-		return $query;
 
+		return $this->db->get();
 	}
 
 	private function get_sale_items_for_migration($sale_id)
@@ -136,3 +137,4 @@ class Migration_Sales_Tax_Data extends CI_Migration
 		}
 	}
 }
+?>
diff --git a/application/models/Appconfig.php b/application/models/Appconfig.php
index 60a89ad1f..085a318b6 100644
--- a/application/models/Appconfig.php
+++ b/application/models/Appconfig.php
@@ -1,22 +1,31 @@
-<?php
-class Appconfig extends CI_Model 
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Appconfig class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
+class Appconfig extends CI_Model
 {
 	public function exists($key)
 	{
-		$this->db->from('app_config');	
+		$this->db->from('app_config');
 		$this->db->where('app_config.key', $key);
 
 		return ($this->db->get()->num_rows() == 1);
 	}
-	
+
 	public function get_all()
 	{
 		$this->db->from('app_config');
 		$this->db->order_by('key', 'asc');
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
-	
+
 	public function get($key)
 	{
 		$query = $this->db->get_where('app_config', array('key' => $key), 1);
@@ -28,7 +37,7 @@ class Appconfig extends CI_Model
 
 		return '';
 	}
-	
+
 	public function save($key, $value)
 	{
 		$config_data = array(
@@ -45,11 +54,11 @@ class Appconfig extends CI_Model
 
 		return $this->db->update('app_config', $config_data);
 	}
-	
+
 	public function batch_save($data)
 	{
 		$success = TRUE;
-		
+
 		//Run these queries as a transaction, we want to make sure we do all or nothing
 		$this->db->trans_start();
 
@@ -64,15 +73,15 @@ class Appconfig extends CI_Model
 
 		return $success;
 	}
-		
+
 	public function delete($key)
 	{
-		return $this->db->delete('app_config', array('key' => $key)); 
+		return $this->db->delete('app_config', array('key' => $key));
 	}
-	
+
 	public function delete_all()
 	{
-		return $this->db->empty_table('app_config'); 
+		return $this->db->empty_table('app_config');
 	}
 
 	public function acquire_save_next_invoice_sequence()
@@ -89,4 +98,4 @@ class Appconfig extends CI_Model
 		return $last_used;
 	}
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/models/Customer.php b/application/models/Customer.php
index 8e8a496c4..1cff3fc2c 100644
--- a/application/models/Customer.php
+++ b/application/models/Customer.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 /**
  * Customer class
@@ -9,16 +9,16 @@
  */
 
 class Customer extends Person
-{	
+{
 	/*
 	Determines if a given person_id is a customer
 	*/
 	public function exists($person_id)
 	{
-		$this->db->from('customers');	
+		$this->db->from('customers');
 		$this->db->join('people', 'people.person_id = customers.person_id');
 		$this->db->where('customers.person_id', $person_id);
-		
+
 		return ($this->db->get()->num_rows() == 1);
 	}
 
@@ -36,7 +36,7 @@ class Customer extends Person
 		}
 
 		return ($this->db->get()->num_rows() == 1);
-	}	
+	}
 
 	/*
 	Gets total of rows
@@ -48,14 +48,14 @@ class Customer extends Person
 
 		return $this->db->count_all_results();
 	}
-	
+
 	/*
 	Returns all the customers
 	*/
 	public function get_all($rows = 0, $limit_from = 0)
 	{
 		$this->db->from('customers');
-		$this->db->join('people', 'customers.person_id = people.person_id');			
+		$this->db->join('people', 'customers.person_id = people.person_id');
 		$this->db->where('deleted', 0);
 		$this->db->order_by('last_name', 'asc');
 
@@ -64,9 +64,9 @@ class Customer extends Person
 			$this->db->limit($rows, $limit_from);
 		}
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
-	
+
 	/*
 	Gets information about a particular customer
 	*/
@@ -76,7 +76,7 @@ class Customer extends Person
 		$this->db->join('people', 'people.person_id = customers.person_id');
 		$this->db->where('customers.person_id', $customer_id);
 		$query = $this->db->get();
-		
+
 		if($query->num_rows() == 1)
 		{
 			return $query->row();
@@ -85,25 +85,25 @@ class Customer extends Person
 		{
 			//Get empty base parent object, as $customer_id is NOT a customer
 			$person_obj = parent::get_info(-1);
-			
+
 			//Get all the fields from customer table
 			//append those fields to base parent object, we we have a complete empty object
 			foreach($this->db->list_fields('customers') as $field)
 			{
 				$person_obj->$field = '';
 			}
-			
+
 			return $person_obj;
 		}
 	}
-	
+
 	/*
 	Gets stats about a particular customer
 	*/
 	public function get_stats($customer_id)
 	{
 		// create a temporary table to contain all the sum and average of items
-		$this->db->query('CREATE TEMPORARY TABLE IF NOT EXISTS ' . $this->db->dbprefix('sales_items_temp') . 
+		$this->db->query('CREATE TEMPORARY TABLE IF NOT EXISTS ' . $this->db->dbprefix('sales_items_temp') .
 			' (INDEX(sale_id))
 			(
 				SELECT
@@ -144,14 +144,14 @@ class Customer extends Person
 
 		return $stat;
 	}
-	
+
 	/*
 	Gets information about multiple customers
 	*/
 	public function get_multiple_info($customer_ids)
 	{
 		$this->db->from('customers');
-		$this->db->join('people', 'people.person_id = customers.person_id');		
+		$this->db->join('people', 'people.person_id = customers.person_id');
 		$this->db->where_in('customers.person_id', $customer_ids);
 		$this->db->order_by('last_name', 'asc');
 
@@ -205,14 +205,14 @@ class Customer extends Person
 				$success = $this->db->update('customers', $customer_data);
 			}
 		}
-		
+
 		$this->db->trans_complete();
 
 		$success &= $this->db->trans_status();
 
 		return $success;
 	}
-	
+
 	/*
 	Updates reward points value
 	*/
@@ -220,7 +220,7 @@ class Customer extends Person
 	{
 		$this->db->where('person_id', $customer_id);
 		$this->db->update('customers', array('points' => $value));
-	} 
+	}
 
 
 	/*
@@ -232,7 +232,7 @@ class Customer extends Person
 
 		return $this->db->update('customers', array('deleted' => 1));
 	}
-	
+
 	/*
 	Deletes a list of customers
 	*/
@@ -242,19 +242,19 @@ class Customer extends Person
 
 		return $this->db->update('customers', array('deleted' => 1));
  	}
- 	
+
  	/*
 	Get search suggestions to find customers
 	*/
 	public function get_search_suggestions($search, $unique = TRUE, $limit = 25)
 	{
 		$suggestions = array();
-		
+
 		$this->db->from('customers');
 		$this->db->join('people', 'customers.person_id = people.person_id');
-		$this->db->group_start();		
+		$this->db->group_start();
 			$this->db->like('first_name', $search);
-			$this->db->or_like('last_name', $search); 
+			$this->db->or_like('last_name', $search);
 			$this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
 		$this->db->group_end();
 		$this->db->where('deleted', 0);
@@ -296,7 +296,7 @@ class Customer extends Person
 				$suggestions[] = array('value' => $row->person_id, 'label' => $row->account_number);
 			}
 		}
-		
+
 		//only return $limit suggestions
 		if(count($suggestions > $limit))
 		{
@@ -325,7 +325,7 @@ class Customer extends Person
 
 		return $this->db->get()->num_rows();
 	}
-	
+
 	/*
 	Performs a search on customers
 	*/
@@ -349,7 +349,7 @@ class Customer extends Person
 			$this->db->limit($rows, $limit_from);
 		}
 
-		return $this->db->get();	
+		return $this->db->get();
 	}
 }
 ?>
diff --git a/application/models/Customer_rewards.php b/application/models/Customer_rewards.php
index 432993f30..2c21e9b8d 100644
--- a/application/models/Customer_rewards.php
+++ b/application/models/Customer_rewards.php
@@ -1,15 +1,24 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Customer_rewards class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  joshua1234511
+ */
+
 class Customer_rewards extends CI_Model
 {
     public function exists($package_id)
     {
-        $this->db->from('customers_packages');  
+        $this->db->from('customers_packages');
         $this->db->where('package_id', $package_id);
 
         return ($this->db->get()->num_rows() >= 1);
     }
 
-    public function save($package_data, $package_id) 
+    public function save($package_data, $package_id)
     {
         $name = $package_data['package_name'];
         $points_percent = $package_data['points_percent'];
@@ -26,7 +35,7 @@ class Customer_rewards extends CI_Model
 
             return $this->db->trans_status();
         }
-        else 
+        else
         {
             $this->db->where('package_id', $package_id);
 
diff --git a/application/models/Dinner_table.php b/application/models/Dinner_table.php
index 4dcdc8c66..2635c3023 100644
--- a/application/models/Dinner_table.php
+++ b/application/models/Dinner_table.php
@@ -1,15 +1,24 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Dinner_table class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  jlctmaster
+ */
+
 class Dinner_table extends CI_Model
 {
     public function exists($dinner_table_id)
     {
-        $this->db->from('dinner_tables');  
+        $this->db->from('dinner_tables');
         $this->db->where('dinner_table_id', $dinner_table_id);
 
         return ($this->db->get()->num_rows() >= 1);
     }
 
-    public function save($table_data, $dinner_table_id) 
+    public function save($table_data, $dinner_table_id)
     {
         $name = $table_data['name'];
 
@@ -25,7 +34,7 @@ class Dinner_table extends CI_Model
 
             return $this->db->trans_status();
         }
-        else 
+        else
         {
             $this->db->where('dinner_table_id', $dinner_table_id);
 
diff --git a/application/models/Employee.php b/application/models/Employee.php
index 7b477d44d..43e7dc940 100644
--- a/application/models/Employee.php
+++ b/application/models/Employee.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 /**
  * Employee class
@@ -15,12 +15,12 @@ class Employee extends Person
 	*/
 	public function exists($person_id)
 	{
-		$this->db->from('employees');	
+		$this->db->from('employees');
 		$this->db->join('people', 'people.person_id = employees.person_id');
 		$this->db->where('employees.person_id', $person_id);
 
 		return ($this->db->get()->num_rows() == 1);
-	}	
+	}
 
 	/*
 	Gets total of rows
@@ -39,21 +39,21 @@ class Employee extends Person
 	public function get_all($limit = 10000, $offset = 0)
 	{
 		$this->db->from('employees');
-		$this->db->where('deleted', 0);		
-		$this->db->join('people', 'employees.person_id = people.person_id');			
+		$this->db->where('deleted', 0);
+		$this->db->join('people', 'employees.person_id = people.person_id');
 		$this->db->order_by('last_name', 'asc');
 		$this->db->limit($limit);
 		$this->db->offset($offset);
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
-	
+
 	/*
 	Gets information about a particular employee
 	*/
 	public function get_info($employee_id)
 	{
-		$this->db->from('employees');	
+		$this->db->from('employees');
 		$this->db->join('people', 'people.person_id = employees.person_id');
 		$this->db->where('employees.person_id', $employee_id);
 		$query = $this->db->get();
@@ -84,11 +84,11 @@ class Employee extends Person
 	public function get_multiple_info($employee_ids)
 	{
 		$this->db->from('employees');
-		$this->db->join('people', 'people.person_id = employees.person_id');		
+		$this->db->join('people', 'people.person_id = employees.person_id');
 		$this->db->where_in('employees.person_id', $employee_ids);
 		$this->db->order_by('last_name', 'asc');
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
 
 	/*
@@ -114,12 +114,12 @@ class Employee extends Person
 				$success = $this->db->update('employees', $employee_data);
 			}
 
-			//We have either inserted or updated a new employee, now lets set permissions. 
+			//We have either inserted or updated a new employee, now lets set permissions.
 			if($success)
 			{
 				//First lets clear out any grants the employee currently has.
 				$success = $this->db->delete('grants', array('person_id' => $employee_id));
-				
+
 				//Now insert the new grants
 				if($success)
 				{
@@ -156,7 +156,7 @@ class Employee extends Person
 
 		//Delete permissions
 		if($this->db->delete('grants', array('person_id' => $employee_id)))
-		{	
+		{
 			$this->db->where('person_id', $employee_id);
 			$success = $this->db->update('employees', array('deleted' => 1));
 		}
@@ -207,7 +207,7 @@ class Employee extends Person
 		$this->db->join('people', 'employees.person_id = people.person_id');
 		$this->db->group_start();
 			$this->db->like('first_name', $search);
-			$this->db->or_like('last_name', $search); 
+			$this->db->or_like('last_name', $search);
 			$this->db->or_like('CONCAT(first_name, " ", last_name)', $search);
 		$this->db->group_end();
 		$this->db->where('deleted', 0);
@@ -299,7 +299,7 @@ class Employee extends Person
 			$this->db->limit($rows, $limit_from);
 		}
 
-		return $this->db->get();	
+		return $this->db->get();
 	}
 
 	/*
@@ -343,7 +343,7 @@ class Employee extends Person
 
 		redirect('login');
 	}
-	
+
 	/*
 	Determins if a employee is logged in
 	*/
@@ -407,7 +407,7 @@ class Employee extends Person
 
 		$query = $this->db->get_where('grants', array('person_id' => $person_id, 'permission_id' => $permission_id), 1);
 
-		return ($query->num_rows() == 1); 
+		return ($query->num_rows() == 1);
 	}
 
  	/*
diff --git a/application/models/Giftcard.php b/application/models/Giftcard.php
index e2266b79c..82c1021aa 100644
--- a/application/models/Giftcard.php
+++ b/application/models/Giftcard.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Giftcard class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Giftcard extends CI_Model
 {
 	/*
@@ -12,7 +21,7 @@ class Giftcard extends CI_Model
 
 		return ($this->db->get()->num_rows() == 1);
 	}
-	
+
 	/*
 	Gets max gift card number
 	*/
@@ -27,7 +36,7 @@ class Giftcard extends CI_Model
 
 		return $this->db->get()->row();
 	}
-	
+
 	/*
 	Gets total of rows
 	*/
@@ -182,7 +191,7 @@ class Giftcard extends CI_Model
 		foreach($this->db->get()->result() as $row)
 		{
 			$suggestions[] = array('label' => $row->first_name.' '.$row->last_name);
-		}			
+		}
 
 		//only return $limit suggestions
 		if(count($suggestions > $limit))
@@ -192,7 +201,7 @@ class Giftcard extends CI_Model
 
 		return $suggestions;
 	}
-	
+
 	/*
 	Performs a search on giftcards
 	*/
@@ -217,7 +226,7 @@ class Giftcard extends CI_Model
 
 		return $this->db->get();
 	}
-	
+
 	/*
 	Gets gift cards
 	*/
@@ -236,7 +245,7 @@ class Giftcard extends CI_Model
 
 		return $this->db->get()->num_rows();
 	}
-	
+
 	/*
 	Gets gift card value
 	*/
@@ -246,13 +255,13 @@ class Giftcard extends CI_Model
 		{
 			return 0;
 		}
-		
+
 		$this->db->from('giftcards');
 		$this->db->where('giftcard_number', $giftcard_number);
 
 		return $this->db->get()->row()->value;
 	}
-	
+
 	/*
 	Updates gift card value
 	*/
@@ -300,7 +309,7 @@ class Giftcard extends CI_Model
 		{
 			return 0;
 		}
-		
+
 		$this->db->from('giftcards');
 		$this->db->where('giftcard_number', $giftcard_number);
 
diff --git a/application/models/Inventory.php b/application/models/Inventory.php
index c01463b0b..bf81c3859 100644
--- a/application/models/Inventory.php
+++ b/application/models/Inventory.php
@@ -1,11 +1,20 @@
-<?php
-class Inventory extends CI_Model 
-{	
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Inventory class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
+class Inventory extends CI_Model
+{
 	public function insert($inventory_data)
 	{
 		return $this->db->insert('inventory', $inventory_data);
 	}
-	
+
 	public function get_inventory_data_for_item($item_id, $location_id = FALSE)
 	{
 		$this->db->from('inventory');
@@ -16,7 +25,7 @@ class Inventory extends CI_Model
         }
 		$this->db->order_by('trans_date', 'desc');
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
 
 	public function reset_quantity($item_id)
@@ -48,4 +57,4 @@ class Inventory extends CI_Model
 		return $this->db->get()->result_array();
 	}
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/models/Item.php b/application/models/Item.php
index 6fe22dfcc..5d757139e 100644
--- a/application/models/Item.php
+++ b/application/models/Item.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Item class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Item extends CI_Model
 {
 	/*
diff --git a/application/models/Item_kit.php b/application/models/Item_kit.php
index 6032a6634..9cbc8beb3 100644
--- a/application/models/Item_kit.php
+++ b/application/models/Item_kit.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Item_kit class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Item_kit extends CI_Model
 {
 	/*
@@ -40,42 +49,42 @@ class Item_kit extends CI_Model
 
 		return $this->db->count_all_results();
 	}
-	
+
 	/*
 	Gets information about a particular item kit
 	*/
 	public function get_info($item_kit_id)
 	{
 		$this->db->select('
-		item_kit_id, 
-		item_kits.name as name, 
-		items.name as item_name, 
-		item_kits.description, 
-		items.description as item_description, 
-		item_kits.item_id as kit_item_id, 
-		kit_discount_percent, 
-		price_option, 
-		print_option, 
-		category, 
-		supplier_id, 
-		item_number, 
-		cost_price, 
-		unit_price, 
-		reorder_level, 
-		receiving_quantity, 
-		pic_filename, 
-		allow_alt_description, 
-		is_serialized, 
-		deleted, 
-		custom1, 
-		custom2, 
-		custom3, 
-		custom4, 
-		custom5, 
-		custom6, 
-		custom7, 
-		custom8, 
-		custom9, 
+		item_kit_id,
+		item_kits.name as name,
+		items.name as item_name,
+		item_kits.description,
+		items.description as item_description,
+		item_kits.item_id as kit_item_id,
+		kit_discount_percent,
+		price_option,
+		print_option,
+		category,
+		supplier_id,
+		item_number,
+		cost_price,
+		unit_price,
+		reorder_level,
+		receiving_quantity,
+		pic_filename,
+		allow_alt_description,
+		is_serialized,
+		deleted,
+		custom1,
+		custom2,
+		custom3,
+		custom4,
+		custom5,
+		custom6,
+		custom7,
+		custom8,
+		custom9,
 		custom10,
 		item_type,
 		stock_type');
@@ -83,7 +92,7 @@ class Item_kit extends CI_Model
 		$this->db->from('item_kits');
 		$this->db->join('items', 'item_kits.item_id = items.item_id', 'left');
 		$this->db->where('item_kit_id', $item_kit_id);
-		
+
 		$query = $this->db->get();
 
 		if($query->num_rows()==1)
@@ -144,7 +153,7 @@ class Item_kit extends CI_Model
 	*/
 	public function delete($item_kit_id)
 	{
-		return $this->db->delete('item_kits', array('item_kit_id' => $id)); 	
+		return $this->db->delete('item_kits', array('item_kit_id' => $id));
 	}
 
 	/*
@@ -154,7 +163,7 @@ class Item_kit extends CI_Model
 	{
 		$this->db->where_in('item_kit_id', $item_kit_ids);
 
-		return $this->db->delete('item_kits');		
+		return $this->db->delete('item_kits');
 	}
 
 	public function get_search_suggestions($search, $limit = 25)
@@ -216,9 +225,9 @@ class Item_kit extends CI_Model
 			$this->db->limit($rows, $limit_from);
 		}
 
-		return $this->db->get();	
+		return $this->db->get();
 	}
-	
+
 	public function get_found_rows($search)
 	{
 		$this->db->from('item_kits');
diff --git a/application/models/Item_kit_items.php b/application/models/Item_kit_items.php
index 293b78b22..1282e8218 100644
--- a/application/models/Item_kit_items.php
+++ b/application/models/Item_kit_items.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Item_kit_items class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Item_kit_items extends CI_Model
 {
 	/*
@@ -55,13 +64,13 @@ class Item_kit_items extends CI_Model
 
 		return $success;
 	}
-	
+
 	/*
 	Deletes item kit items given an item kit
 	*/
 	public function delete($item_kit_id)
 	{
-		return $this->db->delete('item_kit_items', array('item_kit_id' => $item_kit_id)); 
+		return $this->db->delete('item_kit_items', array('item_kit_id' => $item_kit_id));
 	}
 }
 ?>
diff --git a/application/models/Item_quantity.php b/application/models/Item_quantity.php
index ac9ef37f0..96fd64154 100644
--- a/application/models/Item_quantity.php
+++ b/application/models/Item_quantity.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Item_quantity class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   2.x
+ * @author  Padungsak
+ */
+
 class Item_quantity extends CI_Model
 {
     public function exists($item_id, $location_id)
@@ -9,7 +18,7 @@ class Item_quantity extends CI_Model
 
         return ($this->db->get()->num_rows() == 1);
     }
-    
+
     public function save($location_detail, $item_id, $location_id)
     {
         if(!$this->exists($item_id, $location_id))
@@ -22,9 +31,9 @@ class Item_quantity extends CI_Model
 
         return $this->db->update('item_quantities', $location_detail);
     }
-    
+
     public function get_item_quantity($item_id, $location_id)
-    {     
+    {
         $this->db->from('item_quantities');
         $this->db->where('item_id', $item_id);
         $this->db->where('location_id', $location_id);
@@ -42,10 +51,10 @@ class Item_quantity extends CI_Model
 
             $result->quantity = 0;
         }
-		
-        return $result;   
+
+        return $result;
     }
-	
+
 	/*
 	 * changes to quantity of an item according to the given amount.
 	 * if $quantity_change is negative, it will be subtracted,
@@ -59,7 +68,7 @@ class Item_quantity extends CI_Model
 
 		return $this->save($location_detail, $item_id, $location_id);
 	}
-	
+
 	/*
 	* Set to 0 all quantity in the given item
 	*/
@@ -69,7 +78,7 @@ class Item_quantity extends CI_Model
 
         return $this->db->update('item_quantities', array('quantity' => 0));
 	}
-	
+
 	/*
 	* Set to 0 all quantity in the given list of items
 	*/
@@ -80,4 +89,4 @@ class Item_quantity extends CI_Model
         return $this->db->update('item_quantities', array('quantity' => 0));
 	}
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/models/Item_taxes.php b/application/models/Item_taxes.php
index 270a6925f..0e419c092 100644
--- a/application/models/Item_taxes.php
+++ b/application/models/Item_taxes.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Item_taxes class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Item_taxes extends CI_Model
 {
 	/*
@@ -12,14 +21,14 @@ class Item_taxes extends CI_Model
 		//return an array of taxes for an item
 		return $this->db->get()->result_array();
 	}
-	
+
 	/*
 	Inserts or updates an item's taxes
 	*/
 	public function save(&$items_taxes_data, $item_id)
 	{
 		$success = TRUE;
-		
+
 		//Run these queries as a transaction, we want to make sure we do all or nothing
 		$this->db->trans_start();
 
@@ -28,9 +37,9 @@ class Item_taxes extends CI_Model
 		foreach($items_taxes_data as $row)
 		{
 			$row['item_id'] = $item_id;
-			$success &= $this->db->insert('items_taxes', $row);		
+			$success &= $this->db->insert('items_taxes', $row);
 		}
-		
+
 		$this->db->trans_complete();
 
 		$success &= $this->db->trans_status();
@@ -44,10 +53,10 @@ class Item_taxes extends CI_Model
 	public function save_multiple(&$items_taxes_data, $item_ids)
 	{
 		$success = TRUE;
-		
+
 		//Run these queries as a transaction, we want to make sure we do all or nothing
 		$this->db->trans_start();
-		
+
 		foreach(explode(':', $item_ids) as $item_id)
 		{
 			$this->delete($item_id);
@@ -55,7 +64,7 @@ class Item_taxes extends CI_Model
 			foreach($items_taxes_data as $row)
 			{
 				$row['item_id'] = $item_id;
-				$success &= $this->db->insert('items_taxes', $row);		
+				$success &= $this->db->insert('items_taxes', $row);
 			}
 		}
 
@@ -71,7 +80,7 @@ class Item_taxes extends CI_Model
 	*/
 	public function delete($item_id)
 	{
-		return $this->db->delete('items_taxes', array('item_id' => $item_id)); 
+		return $this->db->delete('items_taxes', array('item_id' => $item_id));
 	}
 }
 ?>
diff --git a/application/models/Module.php b/application/models/Module.php
index e89a9bc57..f945b58c7 100644
--- a/application/models/Module.php
+++ b/application/models/Module.php
@@ -1,25 +1,29 @@
-<?php
-class Module extends CI_Model 
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Module class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
+class Module extends CI_Model
 {
-    function __construct()
-    {
-        parent::__construct();
-    }
-	
 	public function get_module_name($module_id)
 	{
 		$query = $this->db->get_where('modules', array('module_id' => $module_id), 1);
-		
+
 		if($query->num_rows() == 1)
 		{
 			$row = $query->row();
 
 			return $this->lang->line($row->name_lang_key);
 		}
-		
+
 		return $this->lang->line('error_unknown');
 	}
-	
+
 	public function get_module_desc($module_id)
 	{
 		$query = $this->db->get_where('modules', array('module_id' => $module_id), 1);
@@ -30,17 +34,17 @@ class Module extends CI_Model
 
 			return $this->lang->line($row->desc_lang_key);
 		}
-	
-		return $this->lang->line('error_unknown');	
+
+		return $this->lang->line('error_unknown');
 	}
-	
+
 	public function get_all_permissions()
 	{
 		$this->db->from('permissions');
 
 		return $this->db->get();
 	}
-	
+
 	public function get_all_subpermissions()
 	{
 		$this->db->from('permissions');
@@ -50,15 +54,15 @@ class Module extends CI_Model
 
 		return $this->db->get();
 	}
-	
+
 	public function get_all_modules()
 	{
 		$this->db->from('modules');
 		$this->db->order_by('sort', 'asc');
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
-	
+
 	public function get_allowed_modules($person_id)
 	{
 		$this->db->from('modules');
@@ -67,7 +71,7 @@ class Module extends CI_Model
 		$this->db->where('person_id', $person_id);
 		$this->db->order_by('sort', 'asc');
 
-		return $this->db->get();		
+		return $this->db->get();
 	}
 }
 ?>
diff --git a/application/models/Person.php b/application/models/Person.php
index 456390ff8..d8b952f44 100644
--- a/application/models/Person.php
+++ b/application/models/Person.php
@@ -1,7 +1,7 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 /**
- * Base class for People classes.
+ * Base class for People classes
  *
  * @link    github.com/jekkos/opensourcepos
  * @since   1.0
diff --git a/application/models/Receiving.php b/application/models/Receiving.php
index cc78d5b5e..117c92c15 100644
--- a/application/models/Receiving.php
+++ b/application/models/Receiving.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Receiving class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Receiving extends CI_Model
 {
 	public function get_info($receiving_id)
diff --git a/application/models/Rewards.php b/application/models/Rewards.php
index 82c7607db..eb5ad50de 100644
--- a/application/models/Rewards.php
+++ b/application/models/Rewards.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Rewards class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  joshua1234511
+ */
+
 class Rewards extends CI_Model
 {
 	/*
diff --git a/application/models/Sale.php b/application/models/Sale.php
index b3d98d54d..1112e6066 100644
--- a/application/models/Sale.php
+++ b/application/models/Sale.php
@@ -1,6 +1,18 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Sale class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Sale extends CI_Model
 {
+	/**
+	 * Get sale info
+	 */
 	public function get_info($sale_id)
 	{
 		// NOTE: temporary tables are created to speed up searches due to the fact that they are ortogonal to the main query
@@ -92,17 +104,17 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
-	/*
-	 Get number of rows for the takings (sales/manage) view
-	*/
+	/**
+	 * Get number of rows for the takings (sales/manage) view
+	 */
 	public function get_found_rows($search, $filters)
 	{
 		return $this->search($search, $filters)->num_rows();
 	}
 
-	/*
-	 Get the sales data for the takings (sales/manage) view
-	*/
+	/**
+	 * Get the sales data for the takings (sales/manage) view
+	 */
 	public function search($search, $filters, $rows = 0, $limit_from = 0, $sort = 'sale_time', $order = 'desc')
 	{
 		$where = '';
@@ -265,9 +277,9 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
-	/*
-	 Get the payment summary for the takings (sales/manage) view
-	*/
+	/**
+	 * Get the payment summary for the takings (sales/manage) view
+	 */
 	public function get_payments_summary($search, $filters)
 	{
 		// get payment summary
@@ -359,9 +371,9 @@ class Sale extends CI_Model
 		return $payments;
 	}
 
-	/*
-	Gets total of rows
-	*/
+	/**
+	 * Gets total of rows
+	 */
 	public function get_total_rows()
 	{
 		$this->db->from('sales');
@@ -369,6 +381,9 @@ class Sale extends CI_Model
 		return $this->db->count_all_results();
 	}
 
+	/**
+	 * Gets search suggestions
+	 */
 	public function get_search_suggestions($search, $limit = 25)
 	{
 		$suggestions = array();
@@ -398,9 +413,9 @@ class Sale extends CI_Model
 		return $suggestions;
 	}
 
-	/*
-	Gets total of invoice rows
-	*/
+	/**
+	 * Gets total of invoice rows
+	 */
 	public function get_invoice_count()
 	{
 		$this->db->from('sales');
@@ -409,6 +424,9 @@ class Sale extends CI_Model
 		return $this->db->count_all_results();
 	}
 
+	/**
+	 * Gets sale by invoice number
+	 */
 	public function get_sale_by_invoice_number($invoice_number)
 	{
 		$this->db->from('sales');
@@ -417,6 +435,9 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
+	/**
+	 * Gets invoice number by year
+	 */
 	public function get_invoice_number_for_year($year = '', $start_from = 0)
 	{
 		$year = $year == '' ? date('Y') : $year;
@@ -429,6 +450,9 @@ class Sale extends CI_Model
 		return ($start_from + $result['invoice_number_year']);
 	}
 
+	/**
+	 * Checks if valid receipt
+	 */
 	public function is_valid_receipt(&$receipt_sale_id)
 	{
 		if(!empty($receipt_sale_id))
@@ -455,6 +479,9 @@ class Sale extends CI_Model
 		return FALSE;
 	}
 
+	/**
+	 * Checks if sale exists
+	 */
 	public function exists($sale_id)
 	{
 		$this->db->from('sales');
@@ -463,6 +490,9 @@ class Sale extends CI_Model
 		return ($this->db->get()->num_rows()==1);
 	}
 
+	/**
+	 * Update sale
+	 */
 	public function update($sale_id, $sale_data, $payments)
 	{
 		$this->db->where('sale_id', $sale_id);
@@ -498,7 +528,7 @@ class Sale extends CI_Model
 	}
 
 
-	/*
+	/**
 	 * Save the sale information after the sales is complete but before the final document is printed
 	 * The sales_taxes variable needs to be initialized to an empty array before calling
 	 */
@@ -767,6 +797,9 @@ class Sale extends CI_Model
 		}
 	}
 
+	/**
+	 * Saves sale tax
+	 */
 	public function save_sales_tax(&$sales_taxes)
 	{
 		foreach($sales_taxes as $line=>$sales_tax)
@@ -775,6 +808,9 @@ class Sale extends CI_Model
 		}
 	}
 
+	/**
+	 * Deletes list of sales
+	 */
 	public function delete_list($sale_ids, $employee_id, $update_inventory = TRUE)
 	{
 		$result = TRUE;
@@ -787,6 +823,9 @@ class Sale extends CI_Model
 		return $result;
 	}
 
+	/**
+	 * Delete sale
+	 */
 	public function delete($sale_id, $employee_id, $update_inventory = TRUE)
 	{
 		// start a transaction to assure data integrity
@@ -836,6 +875,9 @@ class Sale extends CI_Model
 		return $this->db->trans_status();
 	}
 
+	/**
+	 * Gets sale item
+	 */
 	public function get_sale_items($sale_id)
 	{
 		$this->db->from('sales_items');
@@ -844,7 +886,7 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
-	/*
+	/**
 	 * Used by the invoice and receipt programs
 	 */
 	public function get_sale_items_ordered($sale_id)
@@ -897,6 +939,9 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
+	/**
+	 * Gets sale payments
+	 */
 	public function get_sale_payments($sale_id)
 	{
 		$this->db->from('sales_payments');
@@ -905,6 +950,9 @@ class Sale extends CI_Model
 		return $this->db->get();
 	}
 
+	/**
+	 * Gets sale payment options
+	 */
 	public function get_payment_options($giftcard = TRUE, $reward_points = FALSE)
 	{
 		$payments = array();
@@ -943,6 +991,9 @@ class Sale extends CI_Model
 		return $payments;
 	}
 
+	/**
+	 * Gets sale customer name
+	 */
 	public function get_customer($sale_id)
 	{
 		$this->db->from('sales');
@@ -951,6 +1002,9 @@ class Sale extends CI_Model
 		return $this->Customer->get_info($this->db->get()->row()->customer_id);
 	}
 
+	/**
+	 * Gets sale employee name
+	 */
 	public function get_employee($sale_id)
 	{
 		$this->db->from('sales');
@@ -959,6 +1013,9 @@ class Sale extends CI_Model
 		return $this->Employee->get_info($this->db->get()->row()->employee_id);
 	}
 
+	/**
+	 * Checks if quote number exists
+	 */
 	// TODO change to use new quote_number field
 	public function check_quote_number_exists($quote_number, $sale_id = '')
 	{
@@ -972,6 +1029,9 @@ class Sale extends CI_Model
 		return ($this->db->get()->num_rows() == 1);
 	}
 
+	/**
+	 * Checks if invoice number exists
+	 */
 	public function check_invoice_number_exists($invoice_number, $sale_id = '')
 	{
 		$this->db->from('sales');
@@ -984,6 +1044,9 @@ class Sale extends CI_Model
 		return ($this->db->get()->num_rows() == 1);
 	}
 
+	/**
+	 * Gets Giftcard value
+	 */
 	public function get_giftcard_value($giftcardNumber)
 	{
 		if(!$this->Giftcard->exists($this->Giftcard->get_giftcard_id($giftcardNumber)))
@@ -997,7 +1060,10 @@ class Sale extends CI_Model
 		return $this->db->get()->row()->value;
 	}
 
-	//We create a temp table that allows us to do easy report/sales queries
+	/**
+	 * Creates sales temporary dimentional table
+	 * We create a temp table that allows us to do easy report/sales queries
+	 */
 	public function create_temp_table(array $inputs)
 	{
 		if(empty($inputs['sale_id']))
@@ -1133,7 +1199,7 @@ class Sale extends CI_Model
 		$this->db->query('DROP TEMPORARY TABLE IF EXISTS ' . $this->db->dbprefix('sales_items_taxes_temp'));
 	}
 
-	/*
+	/**
 	 * Retrieves all sales that are in a suspended state
 	 */
 	public function get_all_suspended($customer_id = NULL)
@@ -1157,8 +1223,8 @@ class Sale extends CI_Model
 
 	}
 
-	/*
-	 * get the dinner table for the selected sale
+	/**
+	 * Gets the dinner table for the selected sale
 	 */
 	public function get_dinner_table($sale_id)
 	{
@@ -1168,8 +1234,8 @@ class Sale extends CI_Model
 		return $this->db->get()->row()->dinner_table_id;
 	}
 
-	/*
-	 * get the quote_number for the selected sale
+	/**
+	 * Gets the quote_number for the selected sale
  	 */
 	public function get_quote_number($sale_id)
 	{
@@ -1188,8 +1254,8 @@ class Sale extends CI_Model
 		}
 	}
 
-	/*
-	 * get the quote_number for the selected sale
+	/**
+	 * Gets the quote_number for the selected sale
 	 */
 	public function get_comment($sale_id)
 	{
@@ -1208,9 +1274,9 @@ class Sale extends CI_Model
 		}
 	}
 
-	/*
-	* Gets total of suspended invoices rows
-	*/
+	/**
+	 * Gets total of suspended invoices rows
+	 */
 	public function get_suspended_invoice_count()
 	{
 		$this->db->from('sales');
@@ -1220,8 +1286,8 @@ class Sale extends CI_Model
 		return $this->db->count_all_results();
 	}
 
-	/*
-	 * This will remove a selected sale from the sales table.
+	/**
+	 * Removes a selected sale from the sales table.
 	 * This function should only be called for suspended sales that are being restored to the current cart
 	 */
 	public function delete_suspended_sale($sale_id)
@@ -1248,6 +1314,9 @@ class Sale extends CI_Model
 		return $this->db->trans_status();
 	}
 
+	/**
+	 * Gets suspended sale info
+	 */
 	public function get_suspended_sale_info($sale_id)
 	{
 		$this->db->from('sales');
@@ -1256,6 +1325,5 @@ class Sale extends CI_Model
 
 		return $this->db->get();
 	}
-
 }
 ?>
diff --git a/application/models/Sale_suspended.php b/application/models/Sale_suspended.php
index 7cf461152..42b2c9981 100644
--- a/application/models/Sale_suspended.php
+++ b/application/models/Sale_suspended.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Sale_suspended class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   1.0
+ * @author  N/A
+ */
+
 class Sale_suspended extends CI_Model
 {
 	public function get_all()
@@ -8,7 +17,7 @@ class Sale_suspended extends CI_Model
 
 		return $this->db->get();
 	}
-	
+
 	public function get_info($sale_id)
 	{
 		$this->db->from('sales_suspended');
@@ -28,7 +37,7 @@ class Sale_suspended extends CI_Model
 
 		return $this->db->count_all_results();
 	}
-	
+
 	public function get_sale_by_invoice_number($invoice_number)
 	{
 		$this->db->from('sales_suspended');
@@ -44,14 +53,14 @@ class Sale_suspended extends CI_Model
 
 		return ($this->db->get()->num_rows() == 1);
 	}
-	
+
 	public function update($sale_data, $sale_id)
 	{
 		$this->db->where('sale_id', $sale_id);
 
 		return $this->db->update('sales_suspended', $sale_data);
 	}
-	
+
 	public function save($items, $customer_id, $employee_id, $comment, $invoice_number, $quote_number, $payments, $dinner_table, $sale_id = FALSE)
 	{
 		if(count($items) == 0)
@@ -126,7 +135,7 @@ class Sale_suspended extends CI_Model
 						'name'    => $row['name'],
 						'percent' => $row['percent']
 					);
-					
+
 					$this->db->insert('sales_suspended_items_taxes', $sales_items_taxes);
 				}
 			}
@@ -140,20 +149,20 @@ class Sale_suspended extends CI_Model
 		$this->db->update('dinner_tables', $dinner_table_data);
 
 		$this->db->trans_complete();
-		
+
 		if($this->db->trans_status() === FALSE)
 		{
 			return -1;
 		}
-		
+
 		return $sale_id;
 	}
-	
+
 	public function delete($sale_id)
 	{
 		//Run these queries as a transaction, we want to make sure we do all or nothing
 		$this->db->trans_start();
-		
+
 		$dinner_table = $this->get_dinner_table($sale_id);
 		$dinner_table_data = array(
 			'status' => 0
@@ -161,14 +170,14 @@ class Sale_suspended extends CI_Model
 
 		$this->db->where('dinner_table_id',$dinner_table);
 		$this->db->update('dinner_tables', $dinner_table_data);
-		
-		$this->db->delete('sales_suspended_payments', array('sale_id' => $sale_id)); 
-		$this->db->delete('sales_suspended_items_taxes', array('sale_id' => $sale_id)); 
-		$this->db->delete('sales_suspended_items', array('sale_id' => $sale_id)); 
-		$this->db->delete('sales_suspended', array('sale_id' => $sale_id)); 
-		
+
+		$this->db->delete('sales_suspended_payments', array('sale_id' => $sale_id));
+		$this->db->delete('sales_suspended_items_taxes', array('sale_id' => $sale_id));
+		$this->db->delete('sales_suspended_items', array('sale_id' => $sale_id));
+		$this->db->delete('sales_suspended', array('sale_id' => $sale_id));
+
 		$this->db->trans_complete();
-				
+
 		return $this->db->trans_status();
 	}
 
diff --git a/application/models/Stock_location.php b/application/models/Stock_location.php
index 9c533147a..6919974e5 100644
--- a/application/models/Stock_location.php
+++ b/application/models/Stock_location.php
@@ -1,23 +1,32 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Stock_location class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   2.x
+ * @author  Padungsak
+ */
+
 class Stock_location extends CI_Model
 {
     public function exists($location_name = '')
     {
-        $this->db->from('stock_locations');  
+        $this->db->from('stock_locations');
         $this->db->where('location_name', $location_name);
-        
+
         return ($this->db->get()->num_rows() >= 1);
     }
-    
+
     public function get_all($limit = 10000, $offset = 0)
     {
         $this->db->from('stock_locations');
         $this->db->limit($limit);
         $this->db->offset($offset);
-	
+
         return $this->db->get();
     }
-    
+
     public function get_undeleted_all($module_id = 'items')
     {
         $this->db->from('stock_locations');
@@ -66,7 +75,7 @@ class Stock_location extends CI_Model
 
 		return ($this->db->get()->num_rows() == 1);
 	}
-    
+
     public function get_default_location_id()
     {
     	$this->db->from('stock_locations');
@@ -78,16 +87,16 @@ class Stock_location extends CI_Model
 
     	return $this->db->get()->row()->location_id;
     }
-    
-    public function get_location_name($location_id) 
+
+    public function get_location_name($location_id)
     {
     	$this->db->from('stock_locations');
     	$this->db->where('location_id', $location_id);
 
     	return $this->db->get()->row()->location_name;
     }
-    
-    public function save(&$location_data, $location_id) 
+
+    public function save(&$location_data, $location_id)
     {
 		$location_name = $location_data['location_name'];
 
@@ -98,11 +107,11 @@ class Stock_location extends CI_Model
     		$location_data = array('location_name'=>$location_name, 'deleted'=>0);
    			$this->db->insert('stock_locations', $location_data);
    			$location_id = $this->db->insert_id();
-   			 
+
    			$this->_insert_new_permission('items', $location_id, $location_name);
    			$this->_insert_new_permission('sales', $location_id, $location_name);
    			$this->_insert_new_permission('receivings', $location_id, $location_name);
-    		
+
    			// insert quantities for existing items
    			$items = $this->Item->get_all();
    			foreach($items->result_array() as $item)
@@ -112,24 +121,24 @@ class Stock_location extends CI_Model
    			}
 
    			$this->db->trans_complete();
-			
+
 			return $this->db->trans_status();
    		}
-    	else 
+    	else
     	{
     		$this->db->where('location_id', $location_id);
 
     		return $this->db->update('stock_locations', $location_data);
     	}
     }
-    	
+
     private function _insert_new_permission($module, $location_id, $location_name)
     {
     	// insert new permission for stock location
     	$permission_id = $module . '_' . $location_name;
     	$permission_data = array('permission_id' => $permission_id, 'module_id' => $module, 'location_id' => $location_id);
     	$this->db->insert('permissions', $permission_data);
-    	
+
     	// insert grants for new permission
     	$employees = $this->Employee->get_all();
     	foreach($employees->result_array() as $employee)
@@ -138,7 +147,7 @@ class Stock_location extends CI_Model
     		$this->db->insert('grants', $grants_data);
     	}
     }
-    
+
     /*
      Deletes one item
     */
@@ -148,13 +157,13 @@ class Stock_location extends CI_Model
 
     	$this->db->where('location_id', $location_id);
     	$this->db->update('stock_locations', array('deleted' => 1));
-    	
+
     	$this->db->where('location_id', $location_id);
     	$this->db->delete('permissions');
 
     	$this->db->trans_complete();
-		
+
 		return $this->db->trans_status();
     }
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/models/Supplier.php b/application/models/Supplier.php
index cb6797639..7efdafaa1 100644
--- a/application/models/Supplier.php
+++ b/application/models/Supplier.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 /**
  * Supplier class
diff --git a/application/models/Tax.php b/application/models/Tax.php
index a4b613b15..64d287f00 100644
--- a/application/models/Tax.php
+++ b/application/models/Tax.php
@@ -1,4 +1,13 @@
-<?php
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Tax class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
+
 class Tax extends CI_Model
 {
 	/*
@@ -69,8 +78,8 @@ class Tax extends CI_Model
 	}
 
 	/*
-Gets information about a particular tax_code
-*/
+	Gets information about a particular tax_code
+	*/
 	public function get_rate_info($tax_code, $tax_category_id)
 	{
 		$this->db->from('tax_code_rates');
@@ -106,8 +115,8 @@ Gets information about a particular tax_code
 	}
 
 	/*
-	 * Gets the tax code to use for a given customer
-	 */
+	Gets the tax code to use for a given customer
+	*/
 	public function get_sales_tax_code($city = '', $state = '')
 	{
 		// if tax code using both city and state cannot be found then  try again using just the state
@@ -207,7 +216,7 @@ Gets information about a particular tax_code
 
 		if ($tax_rate_data != NULL)
 		{
-			foreach ($tax_rate_data as $row) 
+			foreach ($tax_rate_data as $row)
 			{
 				$row['rate_tax_code'] = $tax_code;
 				$success &= $this->db->insert('tax_code_rates', $row);
@@ -289,7 +298,8 @@ Gets information about a particular tax_code
 		return $this->db->get()->num_rows();
 	}
 
-	public function get_tax_code_type_name($tax_code_type) {
+	public function get_tax_code_type_name($tax_code_type)
+	{
 		if ($tax_code_type == '0')
 		{
 			return $this->lang->line('taxes_sales_tax');
@@ -302,7 +312,6 @@ Gets information about a particular tax_code
 
 	public function get_sales_tax_codes_search_suggestions($search, $limit = 25)
 	{
-
 		$suggestions = array();
 
 		$this->db->from('tax_codes');
diff --git a/application/models/enums/Rounding_code.php b/application/models/enums/Rounding_code.php
index a72bc9aff..451f9576f 100644
--- a/application/models/enums/Rounding_code.php
+++ b/application/models/enums/Rounding_code.php
@@ -1,4 +1,12 @@
-<?php
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Rounding_code class
+ *
+ * @link    github.com/jekkos/opensourcepos
+ * @since   3.1
+ * @author  SteveIreland
+ */
 
 class Rounding_code
 {
@@ -77,4 +85,4 @@ class Rounding_code
 
 		return $x;
 	}
-}
\ No newline at end of file
+}
diff --git a/application/models/reports/Detailed_receivings.php b/application/models/reports/Detailed_receivings.php
index 40e07e339..d26d8bbe2 100644
--- a/application/models/reports/Detailed_receivings.php
+++ b/application/models/reports/Detailed_receivings.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Detailed_receivings extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function create(array $inputs)
 	{
 		//Create our temp tables to work with the data in our report
@@ -42,16 +37,16 @@ class Detailed_receivings extends Report
 
 	public function getDataByReceivingId($receiving_id)
 	{
-		$this->db->select('receiving_id, 
-			MAX(receiving_date) as receiving_date, 
-			SUM(quantity_purchased) AS items_purchased, 
-			MAX(CONCAT(employee.first_name, " ", employee.last_name)) AS employee_name, 
-			MAX(supplier.company_name) AS supplier_name, 
-			SUM(subtotal) AS subtotal, 
-			SUM(total) AS total, 
-			SUM(profit) AS profit, 
-			MAX(payment_type) as payment_type, 
-			MAX(comment) as comment, 
+		$this->db->select('receiving_id,
+			MAX(receiving_date) as receiving_date,
+			SUM(quantity_purchased) AS items_purchased,
+			MAX(CONCAT(employee.first_name, " ", employee.last_name)) AS employee_name,
+			MAX(supplier.company_name) AS supplier_name,
+			SUM(subtotal) AS subtotal,
+			SUM(total) AS total,
+			SUM(profit) AS profit,
+			MAX(payment_type) as payment_type,
+			MAX(comment) as comment,
 			MAX(reference) as reference');
 		$this->db->from('receivings_items_temp');
 		$this->db->join('people AS employee', 'receivings_items_temp.employee_id = employee.person_id');
@@ -64,15 +59,15 @@ class Detailed_receivings extends Report
 
 	public function getData(array $inputs)
 	{
-		$this->db->select('receiving_id, 
-			MAX(receiving_date) as receiving_date, 
-			SUM(quantity_purchased) AS items_purchased, 
-			MAX(CONCAT(employee.first_name," ",employee.last_name)) AS employee_name, 
-			MAX(supplier.company_name) AS supplier_name, 
-			SUM(total) AS total, 
-			SUM(profit) AS profit, 
-			MAX(payment_type) AS payment_type, 
-			MAX(comment) AS comment, 
+		$this->db->select('receiving_id,
+			MAX(receiving_date) as receiving_date,
+			SUM(quantity_purchased) AS items_purchased,
+			MAX(CONCAT(employee.first_name," ",employee.last_name)) AS employee_name,
+			MAX(supplier.company_name) AS supplier_name,
+			SUM(total) AS total,
+			SUM(profit) AS profit,
+			MAX(payment_type) AS payment_type,
+			MAX(comment) AS comment,
 			MAX(reference) AS reference');
 		$this->db->from('receivings_items_temp AS receivings_items_temp');
 		$this->db->join('people AS employee', 'receivings_items_temp.employee_id = employee.person_id');
diff --git a/application/models/reports/Detailed_sales.php b/application/models/reports/Detailed_sales.php
index 6d71e7ff8..97f8d41d8 100644
--- a/application/models/reports/Detailed_sales.php
+++ b/application/models/reports/Detailed_sales.php
@@ -1,14 +1,9 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
 require_once("Report.php");
 
 class Detailed_sales extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function create(array $inputs)
 	{
 		//Create our temp tables to work with the data in our report
@@ -71,17 +66,17 @@ class Detailed_sales extends Report
 
 	public function getData(array $inputs)
 	{
-		$this->db->select('sale_id, 
-			MAX(sale_date) AS sale_date, 
-			SUM(quantity_purchased) AS items_purchased, 
-			MAX(employee_name) AS employee_name, 
-			MAX(customer_name) AS customer_name, 
-			SUM(subtotal) AS subtotal, 
-			SUM(tax) AS tax, 
-			SUM(total) AS total, 
-			SUM(cost) AS cost, 
-			SUM(profit) AS profit, 
-			MAX(payment_type) AS payment_type, 
+		$this->db->select('sale_id,
+			MAX(sale_date) AS sale_date,
+			SUM(quantity_purchased) AS items_purchased,
+			MAX(employee_name) AS employee_name,
+			MAX(customer_name) AS customer_name,
+			SUM(subtotal) AS subtotal,
+			SUM(tax) AS tax,
+			SUM(total) AS total,
+			SUM(cost) AS cost,
+			SUM(profit) AS profit,
+			MAX(payment_type) AS payment_type,
 			MAX(comment) AS comment');
 		$this->db->from('sales_items_temp');
 
diff --git a/application/models/reports/Inventory_low.php b/application/models/reports/Inventory_low.php
index 11584dcc6..2cca4519f 100644
--- a/application/models/reports/Inventory_low.php
+++ b/application/models/reports/Inventory_low.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Inventory_low extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function getDataColumns()
 	{
 		return array(
@@ -18,7 +13,7 @@ class Inventory_low extends Report
 			array('reorder_level' => $this->lang->line('reports_reorder_level')),
 			array('location_name' => $this->lang->line('reports_stock_location')));
 	}
-	
+
 	public function getData(array $inputs)
 	{
 		$this->db->select('items.name, items.item_number, item_quantities.quantity, items.reorder_level, stock_locations.location_name');
@@ -33,7 +28,7 @@ class Inventory_low extends Report
 
 		return $this->db->get()->result_array();
 	}
-	
+
 	public function getSummaryData(array $inputs)
 	{
 		return array();
diff --git a/application/models/reports/Inventory_summary.php b/application/models/reports/Inventory_summary.php
index b2ed5b582..90bdf534e 100644
--- a/application/models/reports/Inventory_summary.php
+++ b/application/models/reports/Inventory_summary.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Inventory_summary extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function getDataColumns()
 	{
 		return array(array('item_name' => $this->lang->line('reports_item_name')),
@@ -22,7 +17,7 @@ class Inventory_summary extends Report
 	}
 
 	public function getData(array $inputs)
-	{	
+	{
 		$this->db->select('items.name, items.item_number, item_quantities.quantity, items.reorder_level, stock_locations.location_name, items.cost_price, items.unit_price, (items.cost_price * item_quantities.quantity) AS sub_total_value');
 		$this->db->from('items AS items');
 		$this->db->join('item_quantities AS item_quantities', 'items.item_id = item_quantities.item_id');
@@ -53,7 +48,7 @@ class Inventory_summary extends Report
 
 	/**
 	 * calculates the total value of the given inventory summary by summing all sub_total_values (see Inventory_summary::getData())
-	 * 
+	 *
 	 * @param array $inputs expects the reports-data-array which Inventory_summary::getData() returns
 	 * @return array
 	 */
@@ -71,7 +66,7 @@ class Inventory_summary extends Report
 
 	/**
 	 * returns the array for the dropdown-element item-count in the form for the inventory summary-report
-	 * 
+	 *
 	 * @return array
 	 */
 	public function getItemCountDropdownArray()
diff --git a/application/models/reports/Report.php b/application/models/reports/Report.php
index 8bde837ba..370470aca 100644
--- a/application/models/reports/Report.php
+++ b/application/models/reports/Report.php
@@ -1,6 +1,6 @@
 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 
-abstract class Report extends CI_Model 
+abstract class Report extends CI_Model
 {
 	function __construct()
 	{
@@ -15,11 +15,11 @@ abstract class Report extends CI_Model
 
 	// Returns the column names used for the report
 	public abstract function getDataColumns();
-	
+
 	// Returns all the data to be populated into the report
 	public abstract function getData(array $inputs);
-	
+
 	// Returns key=>value pairing of summary data for the report
 	public abstract function getSummaryData(array $inputs);
 }
-?>
\ No newline at end of file
+?>
diff --git a/application/models/reports/Specific_customer.php b/application/models/reports/Specific_customer.php
index 675f011f6..17c34b0c0 100644
--- a/application/models/reports/Specific_customer.php
+++ b/application/models/reports/Specific_customer.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Specific_customer extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function create(array $inputs)
 	{
 		//Create our temp tables to work with the data in our report
diff --git a/application/models/reports/Specific_discount.php b/application/models/reports/Specific_discount.php
index 7de97a80b..36a22195c 100755
--- a/application/models/reports/Specific_discount.php
+++ b/application/models/reports/Specific_discount.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Specific_discount extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function create(array $inputs)
 	{
 		//Create our temp tables to work with the data in our report
diff --git a/application/models/reports/Specific_employee.php b/application/models/reports/Specific_employee.php
index 43fe46a5d..350df8283 100644
--- a/application/models/reports/Specific_employee.php
+++ b/application/models/reports/Specific_employee.php
@@ -4,11 +4,6 @@ require_once("Report.php");
 
 class Specific_employee extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	public function create(array $inputs)
 	{
 		//Create our temp tables to work with the data in our report
diff --git a/application/models/reports/Summary_categories.php b/application/models/reports/Summary_categories.php
index e7b3b7401..0c6fbd2c4 100644
--- a/application/models/reports/Summary_categories.php
+++ b/application/models/reports/Summary_categories.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_categories extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_customers.php b/application/models/reports/Summary_customers.php
index 5a644b531..88c13e611 100644
--- a/application/models/reports/Summary_customers.php
+++ b/application/models/reports/Summary_customers.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_customers extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_discounts.php b/application/models/reports/Summary_discounts.php
index 80a279e8b..e94119f6d 100644
--- a/application/models/reports/Summary_discounts.php
+++ b/application/models/reports/Summary_discounts.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_discounts extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_employees.php b/application/models/reports/Summary_employees.php
index 2824911ec..3f9723361 100644
--- a/application/models/reports/Summary_employees.php
+++ b/application/models/reports/Summary_employees.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_employees extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_items.php b/application/models/reports/Summary_items.php
index 515e0f636..b74339f9f 100644
--- a/application/models/reports/Summary_items.php
+++ b/application/models/reports/Summary_items.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_items extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_payments.php b/application/models/reports/Summary_payments.php
index 5e4576dd2..88fe075f1 100644
--- a/application/models/reports/Summary_payments.php
+++ b/application/models/reports/Summary_payments.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_payments extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-	
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_report.php b/application/models/reports/Summary_report.php
index 1e01363ee..df2a18187 100644
--- a/application/models/reports/Summary_report.php
+++ b/application/models/reports/Summary_report.php
@@ -4,15 +4,8 @@ require_once("Report.php");
 
 abstract class Summary_report extends Report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	/*
-
 	Private interface
-
 	*/
 
 	private function _common_select(array $inputs)
diff --git a/application/models/reports/Summary_sales.php b/application/models/reports/Summary_sales.php
index 2c174fa76..6d8dc3b76 100644
--- a/application/models/reports/Summary_sales.php
+++ b/application/models/reports/Summary_sales.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_sales extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
@@ -26,7 +21,7 @@ class Summary_sales extends Summary_report
 		parent::_select($inputs);
 
 		$this->db->select('
-				DATE(sales.sale_time) AS sale_date, 
+				DATE(sales.sale_time) AS sale_date,
 				SUM(sales_items.quantity_purchased) AS quantity_purchased
 		');
 	}
diff --git a/application/models/reports/Summary_suppliers.php b/application/models/reports/Summary_suppliers.php
index 0aad9c808..9ba65c8e8 100644
--- a/application/models/reports/Summary_suppliers.php
+++ b/application/models/reports/Summary_suppliers.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_suppliers extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(
diff --git a/application/models/reports/Summary_taxes.php b/application/models/reports/Summary_taxes.php
index be9eff779..4fec642c0 100644
--- a/application/models/reports/Summary_taxes.php
+++ b/application/models/reports/Summary_taxes.php
@@ -4,11 +4,6 @@ require_once("Summary_report.php");
 
 class Summary_taxes extends Summary_report
 {
-	function __construct()
-	{
-		parent::__construct();
-	}
-
 	protected function _get_data_columns()
 	{
 		return array(