E_COMPILE_WARNING
Constant  
E_COMPILE_WARNING is one of the accepted parameters for error_reporting parameter #1 (optionally as a bitmask).
E_COMPILE_WARNING is one of the return values for error_reporting.
E_COMPILE_WARNING — Compile-time warnings (non-fatal errors).
This is like an E_WARNING,
except it is generated by the Zend Scripting Engine.
  PHP 5  
  PHP 7  
  PHP 8.0  
  PHP 8.1-8.2  
  PHP 8.3  
  PHP 8.4  
  PHP 8.5  
  PHP 8.6  
E_COMPILE_WARNING = 128; E_COMPILE_WARNING Constant Availability
E_COMPILE_WARNING Constant Availability| PHP Version | Availability | 
|---|---|
| PHP 8.6Future Release | Yes | 
| PHP 8.5Upcoming Release | Yes | 
| PHP 8.4Supported (Latest) | Yes | 
| PHP 8.3Supported | Yes | 
| PHP 8.2Security-Fixes Only | Yes | 
| PHP 8.1Security-Fixes Only | Yes | 
| PHP 8.0Unsupported | Yes | 
| PHP 7.4Unsupported | Yes | 
| PHP 7.3Unsupported | Yes | 
| PHP 7.2Unsupported | Yes | 
| PHP 7.1Unsupported | Yes | 
| PHP 7.0Unsupported | Yes | 
| PHP 5.6Unsupported | Yes | 
| PHP 5.5Unsupported | Yes | 
| PHP 5.4Unsupported | Yes | 
| PHP 5.3Unsupported | Yes |