trigger_error

Description

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:

<?php
if (assert ($divisor == 0)) {
  trigger_error ("Cannot divide by zero", E_USER_ERROR);
}
 ?>

See also error_reporting(), set_error_handler(), restore_error_handler(), and user_error().