ReflectionClass::isInstance Checks class for instance &reftitle.description; public boolReflectionClass::isInstance objectobject Checks if an object is an instance of a class. &reftitle.parameters; object The object being compared to. &reftitle.returnvalues; &return.success; &reftitle.examples; isInstance($arg)) { echo "Yes"; } // Equivalent to if ($arg instanceof Foo) { echo "Yes"; } // Equivalent to if (is_a($arg, 'Foo')) { echo "Yes"; } ?> ]]> &example.outputs.similar; &reftitle.seealso; ReflectionClass::isInterface Type operators (instanceof) Object Interfaces is_a