SPL Functions
PHP Manual

class_implements

Return the interfaces which are implemented by the given class or interface

Description

array class_implements ( mixed $class [, bool $autoload = true ] )

This function returns an array with the names of the interfaces that the given class and its parents implement.

Parameters

class

An object (class instance) or a string (class or interface name).

autoload

Whether to allow this function to load the class automatically through the __autoload magic method.

Return Values

An array on success, or FALSE on error.

Changelog

Version Description
5.1.0 Added the option to pass the class parameter as a string. Added the autoload parameter.

Examples

Example #1 class_implements example

<?php

interface foo { }
class bar implements foo {}

print_r(class_implements(new bar));

// since PHP 5.1.0 you may also specify the parameter as a string
print_r(class_implements('bar'));


function __autoload($class_name) {
   require_once $class_name . '.php';
}

// use __autoload to load the 'not_loaded' class
print_r(class_implements('not_loaded', true));

?>

The above example will output something similar to:

Array
(
    [foo] => foo
)

Array
(
    [interface_of_not_loaded] => interface_of_not_loaded
)

See Also

  • class_parents
  • get_declared_interfaces