PHP K�sikirja
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# trigger_error

(PHP 4 >= 4.0.1, PHP 5)

trigger_error -- Generates a user-level error/warning/notice message

## Description

bool trigger_error ( string error_msg [, int error_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 returns `FALSE` if wrong error_type is specified, `TRUE` otherwise.

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); } ?>`

> Huomaa: See set_error_handler() for a more extensive example.

> Huomaa: 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(), and error level constants.

Edellinen | Alkuun | Seuraava
set_exception_handler | Ylös | user_error