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PHP Manual

# interface_exists

(PHP 5 >= 5.0.2)

interface_exists — Checks if the interface has been defined

### Opis

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

Checks if the given interface has been defined.

### Parametry

`interface_name`

  The interface name

`autoload`

  Whether to call __autoload or not by default.

### Zwracane wartości

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

### Przykłady

Przykład #1 interface_exists() example

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

### Zobacz też:

- get_declared_interfaces() - Returns an array of all declared interfaces
- class_implements() - Return the interfaces which are implemented by the given class
- class_exists() - Sprawdza, czy klasa została zdefiniowana

get_parent_class
is_a
Funkcje Klasy/Obiekty
PHP Manual