E_USER_ERROR

E_USER_ERROR is one of the accepted parameters for:

• error_reporting parameter #1 (optionally as a bitmask)
• trigger_error parameter #2
• user_error parameter #2

E_USER_ERROR is one of the return values for error_reporting.

E_USER_ERROR — User-generated error message. This is like an E_ERROR, except it is generated in PHP code by using the PHP function trigger_error.

E_USER_ERROR = 256;