interface_exists

Description

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

例子 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().