Attributes queries fixes

- Minor formatting fixes
- Adding back bitwise equals into query using RawSql()
- Corrected GET method to POST
- Removed if statement causing no attribute values
- Removed param in get() from CI3
- Changed setAttribute to setTextAttribute
- Replaced NULL constant with null keyword PSR-2,12
- Replaced TRUE/FALSE constants with true/false keywords PSR-2,12
- explicit cast to get rid of deprecation warning
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