get_parent_class
is_a
Klassen- und Objekt-Funktionen
PHP Manual

# interface_exists

(PHP 5 >= 5.0.2)

interface_exists — Checks if the interface has been defined

### Beschreibung

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

Checks if the given interface has been defined.

### Parameter-Liste

`interface_name`

  The interface name

`autoload`

  Whether to call __autoload or not by default

### Rückgabewerte

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

### Beispiele

Beispiel #1 interface_exists() example

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

### Siehe auch

- class_exists()

get_parent_class
is_a
Klassen- und Objekt-Funktionen
PHP Manual