PHP interface_exists() function usage and example

PHP Class/Object function reference manual

The interface_exists() function checks if the interface has been defined

Syntax

interface_exists( $interface_name[, $autoload]);

Definition and usage

This function checks if the given interface is already defined.

Parameter

Return value

　This function returns TRUE if the interface defined by interface_name is already defined, otherwise it returns FALSE.

Online examples

Here is the usage of this function-

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

　PHP Class/Object function reference manual