Type Operators

Type Operators

PHP has a single type operator: instanceof is used to determine whether a given object, his parents or their implemented interfaces are of a specified object class.

The instanceof operator was introduced in PHP 5. Before this time is_a() was used but is_a() has since been deprecated in favor of instanceof.

<?php
class A { }
class
B { }

$thing = new A;

if (
$thing instanceof A) {
    echo
'A';
}
if (
$thing instanceof B) {
    echo
'B';
}
?>

As $thing is an object of type A, but not B, only the block dependent on the A type will be executed:

A

See also get_class() and is_a().

© Copyright 2003-2014 www.php-editors.com. The ultimate PHP Editor and PHP IDE site.