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); ?> |
Output:
bool(false)
Reference: https://secure.php.net/manual/en/reflectionclass.isinstance.php
