PHP | ReflectionClass isInstance() Function Last Updated : 30 Nov, 2019 Comments Improve Suggest changes Like Article Like Report 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 <?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 <?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 Comment More infoAdvertise with us Next Article PHP | ReflectionClass isInstance() Function K Kanchan_Ray Follow Improve Article Tags : Web Technologies PHP PHP-function PHP- ReflectionClass PHP- Reflection +1 More Similar Reads PHP | ReflectionClass isInterface() Function The ReflectionClass::isInterface() function is an inbuilt function in PHP which is used to check the specified class is an interface or not. Syntax: bool ReflectionClass::isInterface( void ) Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if the spe 1 min read PHP | ReflectionClass isInstantiable() Function The ReflectionClass::isInstantiable() function is an inbuilt function in PHP which is used to check the specified class is instantiable or not. Syntax: bool ReflectionClass::isInstantiable( void ) Parameters: This function does not accept any parameters. Return Value: This function returns TRUE if t 1 min read PHP | ReflectionClass isFinal() Function The ReflectionClass::isFinal() function is an inbuilt function in PHP which is used to check the specified class is final or not. Syntax: bool ReflectionClass::isFinal( void ) Parameters: This function does not accept any parameters. Return Value: This function returns true for the success or false 1 min read PHP | ReflectionClass isInternal() Function The ReflectionClass::isInternal() function is an inbuilt function in PHP which is used to check if class is defined internally by an extension, or the core. Syntax: bool ReflectionClass::isInternal( void ) Parameters: This function does not accept any parameters. Return Value: This function returns 1 min read PHP | ReflectionClass isAbstract() Function The ReflectionClass::isAbstract() function is an inbuilt function in PHP which is used to check the specified class is abstract or not. Syntax: bool ReflectionClass::isAbstract( void ) Parameters: This function does not accept any parameters. Return Value: This function returns true for the success 1 min read Like