PHP Tutorial - PHP instanceof

PHP instanceof is an operator. instanceof returns true if the object on the lefthand side is of the same class, or a descendant of, the class given on the righthand side.

You can also use the instanceof keyword to check whether an object implements an interface.

Syntax

PHP instanceof has the syntax of.

$varaibleName instanceof ClassName

Example

For example, given the code &aBook = new ComputerBook;.


<?PHP
class Person {
}
$bill = new Person();

if ($bill instanceof Person) { 
   print("Is a person");
}
?>

The code above generates the following result.