PHP: Hypertext Preprocessor (original) (raw)
class_implements
(PHP 5, PHP 7, PHP 8)
class_implements — Return the interfaces which are implemented by the given class or interface
Description
Parameters
object_or_class
An object (class instance) or a string (class or interface name).
autoload
Whether to autoload if not already loaded.
Return Values
An array on success, or [false](reserved.constants.php#constant.false) when the given class doesn't exist.
Examples
Example #1 class_implements() example
<?phpinterface foo { } class bar implements foo {}print_r(class_implements(new bar));// you may also specify the parameter as a string print_r(class_implements('bar'));spl_autoload_register();// use autoloading 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 ( [foo] => foo ) Array ( [interface_of_not_loaded] => interface_of_not_loaded )
Notes
Note: To check that an object implements an interface, instanceof or the is_a() function should be used instead.
See Also
- class_parents() - Return the parent classes of the given class
- get_declared_interfaces() - Returns an array of all declared interfaces
- is_a() - Checks whether the object is of a given type or subtype
- instanceof
Found A Problem?
ludvig dot ericson at gmail dot nospam dot com ¶
19 years ago
`Hint:
would check if 'your-interface' is ONE of the implemented interfaces.
Note that you can use something similar to be sure the class only implements that, (whyever you would want that?)
I use the first technique to check if a module has the correct interface implemented, or else it throws an exception.`
a dot panek at brainsware dot org ¶
11 years ago
`Calling class_implements with a non-loadable class name or a non-object results in a warning:
This is not documented and should just return FALSE as the documentation above says.
`
19 years ago
`Luckily, it prints out superinterfaces as well in reverse order so iterative searching works fine:
prints out:
Array
(
[InterfaceB] => InterfaceB
[InterfaceA] => InterfaceA
)
`