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
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
characters in length. Any additional characters beyond 1024 will be
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_type
specified, TRUE otherwise.