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ReflectionClass::isSubclassOf

(PHP 5, PHP 7)

ReflectionClass::isSubclassOf — Checks if a subclass

Opis

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

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

Parametry

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

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Zobacz też:

ReflectionClass::isInterface() - Checks if the class is an interface
ReflectionClass::implementsInterface() - Implements interface
is_subclass_of() - Sprawdza czy klasa jest jednym z rodziców obiektu lub implementuje go
get_parent_class() - Zwraca nazwę klasy rodzica dla obiektu lub klasy

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User Contributed Notes 2 notes

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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

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voitcus at gmail dot com ¶

4 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

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