PHP | ReflectionClass isInstance() Function

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:

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<?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);
?>

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Output:

bool(true)

Program 2:

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<?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);
?>

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Output:

bool(false)

Reference: https://secure.php.net/manual/en/reflectionclass.isinstance.php

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