interface_exists

(PHP 5 >= 5.0.2)

interface_exists — Checks if the interface has been defined

Description

bool interface_exists ( string $interface_name [, bool $autoload ] )

Checks if the given interface has been defined.

Parameters

interface_name

The interface name

autoload

Whether to call __autoload or not by default

Return Values

Returns TRUE if the interface given by interface_name has been defined, FALSE otherwise.

Examples

Example #1 interface_exists() example

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

?>

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