Used to trigger a user error condition, it can be used 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).
This function is useful when you need to generate a particular response to an exception at runtime.
The designated error message for this error. It's limited to 1024 bytes in length. Any additional characters beyond 1024 bytes will be truncated.
The designated error type for this error. It only works with the E_USER family of constants, and will default to E_USER_NOTICE.
This function returns false if wrong error_level is specified, true otherwise.
HTML entities in message are not escaped. Use htmlentities on the message if the error is to be displayed in a browser.