W3cubDocs

/PHP

ReflectionClass::isSubclassOf

(PHP 5, PHP 7, PHP 8)

ReflectionClass::isSubclassOf — Checks if a subclass

Description

public ReflectionClass::isSubclassOf(ReflectionClass|string $class): bool

Checks if the class is a subclass of a specified class or implements a specified interface.

Parameters

class: Either the name of the class as string or a ReflectionClass object of the class to check against.

Return Values

Returns true if the class is a subclass of the specified class or interface, or false otherwise.

See Also

ReflectionClass::isInterface() - Checks if the class is an interface
ReflectionClass::implementsInterface() - Implements interface
is_subclass_of() - Checks if the object has this class as one of its parents or implements it
get_parent_class() - Retrieves the parent class name for object or class

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/reflectionclass.issubclassof.php