Kazi is_subclass_of

Kazi is_subclass_of inakagua ikiwa kitu au darasa ni mzao wa darasa maalum au inatekeleza interface maalum. Inakubali parameta ya kwanza kama kitu au jina la darasa, ya pili - jina la darasa mzazi au interface. Parameta ya tatu ya hiari inabainisha ikiwa inahitajukuzima wa madarasa.

Syntax

is_subclass_of(mixed $object_or_class, string $class, bool $allow_string = true): bool

Mfano

Lets check inheritance of simple classes:

<?php
	class ParentClass {}
	class ChildClass extends ParentClass {}

	$res = is_subclass_of('ChildClass', 'ParentClass');
	var_dump($res);
?>

Result of code execution:

true

Mfano

Lets check interface implementation:

<?php
	interface MyInterface {}
	class MyClass implements MyInterface {}

	$res = is_subclass_of('MyClass', 'MyInterface');
	var_dump($res);
?>

Result of code execution:

true

Mfano

Checking with object instead of class name:

<?php
	class Animal {}
	class Dog extends Animal {}

	$dog = new Dog();
	$res = is_subclass_of($dog, 'Animal');
	var_dump($res);
?>

Result of code execution:

true

Mfano

Checking case when class is not a descendant:

<?php
	class A {}
	class B {}

	$res = is_subclass_of('B', 'A');
	var_dump($res);
?>

Result of code execution:

false

Angalia pia

kazi is_a,
inayokagua ushiriki katika darasa
kazi class_parents,
inayorudisha wazazi wote
kazi get_parent_class,
inayorudisha darasa la mzazi
kazi instanceof,
operator ya kukagua mfano