- Replaced TRUE/FALSE constants with true/false keywords
- Replaced NULL constant with null keyword
- Replaced `<?php echo` in views with shortened `<?=`
- Added missing variable declaration
- Added missing function return type in declaration
- replaced `== true`, `== false`, `=== true` and `=== false` in if statements with simplified forms
- missing return type in Events->load_config(), added void
- Dynamic property creation is deprecated starting in php 8.2. The solution is to declare the property in the class before using it.
- Added ::class to model instantiations to remove "potentially polymorphic call" warnings
- Corrected phpdoc
