PHP: interface_exists

Description

bool interface_exists ( string interface_name [, bool autoload] )

This function returns TRUE if the interface given by interface_name has been defined, FALSE otherwise.

Example 1. interface_exists() example

<?php // Check the interface exists before trying to use it if (interface_exists('MyInterface')) { class MyClass implements MyInterface { // Methods } } ?>

interface_exists() will attempt to call __autoload by default, if you don't want interface_exists() to call __autoload, you can set the parameter autoload to FALSE.

See also class_exists().

User Contributed Notes
interface_exists

andrey at php dot net
24-Oct-2004 06:40


As far as I remember interface_exists() was added in 5.0.2 . In 5.0.0 and 5.0.1 class_exists() used to return TRUE when asked for a existing interface. Starting 5.0.2 class_exists() doesn't do that anymore.