Type (instanceof) Operators in PHP : Tutorial

instanceof is a Type operator in PHP. It is used to determine whether a PHP variable is an instantiated object of a certain class.

Syntax

($variable instanceof Class_Name)

<?php

class Class_A
{
}

class Class_B
{
}

$obj_A = new Class_A;

var_dump($obj_A instanceof Class_A);

echo "<br>";

var_dump($obj_A instanceof Class_B);

?>

Output
	

bool(true) 
bool(false)

Instanceof with inherited classes

Example :

<?php

class Class_A
{
}

class Class_B extends Class_A
{
}

$obj = new Class_B;

var_dump($obj instanceof Class_A);

echo "<br>";

var_dump($obj instanceof Class_B);

?>

Output
	

bool(true) 
bool(true)