PHP instanceof

Description

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.

Example

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

<?PHP//w  ww .  ja v  a 2  s . com
class Person {
}
$bill = new Person();

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

The code above generates the following result.