E_CORE_WARNING

E_CORE_WARNING is one of the accepted parameters for error_reporting parameter #1 (optionally as a bitmask).

E_CORE_WARNING is one of the return values for error_reporting.

E_CORE_WARNING — Warnings (non-fatal errors) that occur during PHP's initial startup. This is like an E_WARNING, except it is generated by the core of PHP.

E_CORE_WARNING = 32;