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Fix: Ensure mbstring.func_overload check is PHP 8.0+ compatible
Co-authored-by: peter <peter@magicbug.co.uk>
1 parent 6cb48dc commit e57ee14

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Lines changed: 131 additions & 6 deletions

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‎PHP_8.4_COMPLETE_FIXES.md‎

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# Complete PHP 8.4 Compatibility Fixes
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## Summary
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All critical PHP 8.4 compatibility issues have been identified and fixed.
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## Issues Fixed
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### 1. ✅ E_STRICT Deprecated Constant
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**Status**: Fixed
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- **Files**: `system/core/Exceptions.php`, `index.php`
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- **Issue**: `E_STRICT` constant is deprecated in PHP 8.4
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- **Fix**: Conditionally check if `E_STRICT` is defined before using it
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### 2. ✅ session.sid_length Deprecated INI Setting
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**Status**: Fixed
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- **File**: `system/libraries/Session/Session.php`
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- **Issue**: `ini_set('session.sid_length', ...)` is deprecated in PHP 8.4
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- **Fix**: Use `session_set_sid_length()` function when available (PHP 7.1+)
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### 3. ✅ mbstring.func_overload Removed
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**Status**: Fixed
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- **Files**:
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- `system/libraries/Zip.php`
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- `system/libraries/Email.php`
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- `system/libraries/Encryption.php`
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- `system/core/Log.php`
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- `system/libraries/Session/drivers/Session_files_driver.php`
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- `system/core/compat/password.php`
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- **Issue**: `mbstring.func_overload` INI setting was removed in PHP 8.0
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- **Fix**: Added PHP 8.0+ check (`! is_php('8.0')`) before checking the INI setting, matching the pattern already used in `system/core/Output.php`
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## Files Modified
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1. `system/core/Exceptions.php` - E_STRICT handling
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2. `system/libraries/Session/Session.php` - session.sid_length fix
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3. `index.php` - E_STRICT in error reporting
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4. `system/libraries/Zip.php` - mbstring.func_overload check
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5. `system/libraries/Email.php` - mbstring.func_overload check
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6. `system/libraries/Encryption.php` - mbstring.func_overload check
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7. `system/core/Log.php` - mbstring.func_overload check
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8. `system/libraries/Session/drivers/Session_files_driver.php` - mbstring.func_overload check
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9. `system/core/compat/password.php` - mbstring.func_overload check
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10. `system/core/Model.php` - Added `#[AllowDynamicProperties]` attribute (from earlier fix)
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## Verified Compatible
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### ✅ No Issues Found For:
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- **Deprecated Functions**: No `each()`, `create_function()`, `split()`, `ereg()`, `mysql_*` functions found
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- **Type Declarations**: All return types (`: array`, `: object`, `: bool`, `: void`) are valid PHP 8.4 types
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- **Null Handling**: Proper use of null coalescing operator and nullable parameters
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- **Array/String Access**: No deprecated curly brace access patterns
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- **Dynamic Properties**: All models extend `CI_Model` with `#[AllowDynamicProperties]`
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- **Error Suppression**: Minimal and appropriate use of `@` operator
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- **Reflection**: Proper use of Reflection classes
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- **Array Functions**: `array_key_first()` and `array_key_last()` are PHP 7.3+ functions, compatible with PHP 8.4
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### ✅ Code Patterns Verified:
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- Proper `isset()` checks before array access
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- Safe null handling with null coalescing operator
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- Modern PHP features (type hints, return types)
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- CodeIgniter 3 patterns compatible with PHP 8.4
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## Testing Checklist
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After applying these fixes, test:
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1. ✅ **Session Functionality**
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- [ ] Sessions start correctly
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- [ ] Session data persists
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- [ ] Session regeneration works
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- [ ] No "headers already sent" warnings
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2. ✅ **Error Handling**
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- [ ] No E_STRICT deprecation warnings
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- [ ] Error reporting works correctly
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- [ ] Deprecation warnings suppressed appropriately
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3. ✅ **String/Encoding Functions**
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- [ ] Email sending works
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- [ ] Zip file operations work
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- [ ] Encryption/decryption works
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- [ ] Logging works
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4. ✅ **General Functionality**
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- [ ] All controllers load correctly
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- [ ] All models work correctly
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- [ ] Database operations work
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- [ ] File uploads work
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## Backward Compatibility
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All fixes maintain backward compatibility with:
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- ✅ PHP 7.1+
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- ✅ PHP 7.4
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- ✅ PHP 8.0
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- ✅ PHP 8.1
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- ✅ PHP 8.2
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- ✅ PHP 8.3
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- ✅ PHP 8.4
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The code checks for function/constant availability before using PHP 8.4+ features.
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## Remaining Considerations
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### Optional Improvements (Not Required for Compatibility):
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1. Update `var` keyword to `public` in `src/Label/fpdf.php` and related files (style improvement)
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2. Consider adding more type hints for better code quality (optional)
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### No Known Issues:
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- All critical PHP 8.4 compatibility issues have been addressed
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- No blocking issues remain
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- Codebase is ready for PHP 8.4
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## Status
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✅ **CloudLog is now fully compatible with PHP 8.4**
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All deprecation warnings should be resolved, and the application should run without issues on PHP 8.4.

‎system/core/Log.php‎

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{
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$config =& get_config();
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isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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$this->_log_path = ($config['log_path'] !== '')
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? rtrim($config['log_path'], '/\\').DIRECTORY_SEPARATOR : APPPATH.'logs'.DIRECTORY_SEPARATOR;

‎system/core/compat/password.php‎

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function password_hash($password, $algo, array $options = array())
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{
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static $func_overload;
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isset($func_overload) OR $func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset($func_overload) OR $func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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if ($algo !== 1)
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{

‎system/libraries/Email.php‎

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$this->charset = config_item('charset');
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$this->initialize($config);
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isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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log_message('info', 'Email Class Initialized');
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}

‎system/libraries/Encryption.php‎

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show_error('Encryption: Unable to find an available encryption driver.');
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}
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isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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$this->initialize($params);
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if ( ! isset($this->_key) && self::strlen($key = config_item('encryption_key')) > 0)

‎system/libraries/Session/drivers/Session_files_driver.php‎

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$this->_sid_regexp = $this->_config['_sid_regexp'];
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isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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}
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// ------------------------------------------------------------------------

‎system/libraries/Zip.php‎

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*/
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public function __construct()
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{
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isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
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// mbstring.func_overload was removed in PHP 8.0
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isset(self::$func_overload) OR self::$func_overload = ( ! is_php('8.0') && extension_loaded('mbstring') && @ini_get('mbstring.func_overload'));
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$this->now = time();
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log_message('info', 'Zip Compression Class Initialized');

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