trigger_error Generates a user-level error/warning/notice message voidtrigger_error stringerror_msg interror_type Used to trigger a user error condition, it can be used by in conjunction with the built-in error handler, or with a user defined function that has been set as the new error handler (set_error_handler). It only works with the E_USER family of constants, and will default to E_USER_NOTICE. This function is useful when you need to generate a particular response to an exception at runtime. For example: See set_error_handler for a more extensive example. error_msg is limited to 1024 characters in length. Any additional characters beyond 1024 will be truncated. See also error_reporting, set_error_handler, restore_error_handler, user_error