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Type Operators

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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