Edit Report a Bug

ReflectionClass::isSubclassOf

(PHP 5, PHP 7)

ReflectionClass::isSubclassOf — Checks if a subclass

Descrierea

public ReflectionClass::isSubclassOf ( mixed $class ) : bool

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

Parametri

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

Valorile întoarse

Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

A se vedea și

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

add a note

User Contributed Notes 2 notes

down

dhairya lakhera ¶

8 years ago


class A {}
class B {}
class C extends B {}

$obj=new ReflectionClass('C');

var_dump($obj->isSubclassOf ('A')); //boolean false
var_dump($obj->isSubclassOf ('B')); //boolean true

down

voitcus at gmail dot com ¶

5 years ago


Note, that this method is a bit different than the `instanceof` operator, which returns true, when it is a subclass or the very same class (interface). Here, only being a subclass results in true, eg.

class A {}
class B extends A {}

$a = new ReflectionClass('A');
$AA = new A;
$b = new ReflectionClass('B');
$BB = new B;

var_dump($a->isSubclassOf($b)); // false
var_dump($AA instanceof $BB); // false

var_dump($b->isSubclassOf($a)); // true
var_dump($BB instanceof $AA); // true

var_dump($a->isSubclassOf($a)); // false
var_dump($AA instanceof $AA); // true

add a note