PHP | ReflectionClass isInterface() Function Last Updated : 17 Dec, 2019 Comments Improve Suggest changes Like Article Like Report 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 specified class is an interface, otherwise FALSE. Below programs illustrate the ReflectionClass::isInterface() function in PHP: Program 1: php <?php // Initializing a user-defined interface Departments interface Departments { public function CSE(); } // Using ReflectionClass() over the // user-defined interface Departments $class = new ReflectionClass('Departments'); // Calling the isInterface() function $instance = $class->isInterface(); // Getting the value true or false var_dump($instance); ?> Output: bool(true) Program 2: php <?php // Initializing a user-defined class TestInterface Class TestInterface { } // Using ReflectionClass() over the // user-defined class TestInterface $class = new ReflectionClass('TestInterface'); // Calling the isInterface() function and // getting the value true or false var_dump($class->isInterface()); ?> Output: bool(false) Reference: https://www.php.net/manual/en/reflectionclass.isinterface.php Comment More infoAdvertise with us Next Article PHP | ReflectionClass isInterface() Function K Kanchan_Ray Follow Improve Article Tags : Web Technologies PHP PHP-function PHP- ReflectionClass Similar Reads 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. 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