# ReflectionClass::isSubclassOf

(PHP 5, PHP 7)

ReflectionClass::isSubclassOf — Checks if a subclass

### Description

public ReflectionClass::isSubclassOf ( mixed `$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` on success or `FALSE` on failure.

### 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