PHP has a single type operator: instanceof. instanceof is used to determine whether a given object is of a specified object class.
instanceof was introduced in PHP 5.
<?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
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