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interface_exists

Checks if the interface has been defined (PHP 5 >= 5.0.2)
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 382. interface_exists() example

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

?>