PHP | ReflectionClass isInstance() Function

0 0 1 minute read

The ReflectionClass::isInstance() function is an inbuilt function in PHP which is used to check whether the specified object is an instance of the class or not.

Syntax:

bool ReflectionClass::isInstance( object $object )

Parameters: This function accepts a single parameter object which is being searched in the instance of the class.

Return Value: This function returns true for the success or false on failure.

Below programs illustrate the ReflectionClass::isInstance() function in PHP:

Program 1:

<?php 
  
// Declaring a user-defined class 
class  GFG { } 
  
// Initialising the instance 
$Instance = new GFG(); 
  
// Using ReflectionClass over the 
// instance GFG 
$obj = new ReflectionClass('GFG'); 
  
// Calling isInstance() function 
$A = $obj->isInstance($Instance); 
  
// Getting the value true or false 
var_dump($A); 
?> 

Output:

bool(true)

Program 2:

<?php 
  
// Declaring a user-defined class 
class  GFG { } 
  
// Using ReflectionClass over the 
// instance GFG 
$obj = new ReflectionClass('GFG'); 
  
// Calling isInstance() function 
$A = $obj->isInstance($obj); 
  
// Getting the value true or false 
var_dump($A); 
?> 