class MyClass { } $obj = new MyClass(); $reflect = new ReflectionClass('MyClass'); // check if $obj is an instance of MyClass if ($reflect->isInstance($obj)) { echo '$obj is an instance of MyClass'; } else { echo '$obj is NOT an instance of MyClass'; }In this example, we create a class called MyClass and an object of that class. We then use ReflectionClass to get information about the MyClass class and use the isInstance method to check if the $obj object is an instance of MyClass. This functionality could be useful in package libraries for checking if an object is an instance of a specific class before using it in certain functions or methods that require that specific class.