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--TEST-- ReflectionObject::isSubclassOf() - basic function test --FILE-- <?php class A {} class B extends A {} class C extends B {} interface I {} class X implements I {} $classNames = array('A', 'B', 'C', 'I', 'X'); //Create ReflectionClasses foreach ($classNames as $className) { $rcs[$className] = new ReflectionClass($className); } //Create ReflectionObjects foreach ($classNames as $className) { if ($rcs[$className]->isInstantiable()) { $ros[$className] = new ReflectionObject(new $className); } } foreach ($ros as $childName => $child) { foreach ($rcs as $parentName => $parent) { echo "Is " . $childName . " a subclass of " . $parentName . "? \n"; echo " - Using ReflectionClass object argument: "; var_dump($child->isSubclassOf($parent)); if ($parent->isInstantiable()) { echo " - Using ReflectionObject object argument: "; var_dump($child->isSubclassOf($ros[$parentName])); } echo " - Using string argument: "; var_dump($child->isSubclassOf($parentName)); } } ?> --EXPECTF-- Is A a subclass of A? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is A a subclass of B? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is A a subclass of C? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is A a subclass of I? - Using ReflectionClass object argument: bool(false) - Using string argument: bool(false) Is A a subclass of X? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is B a subclass of A? - Using ReflectionClass object argument: bool(true) - Using ReflectionObject object argument: bool(true) - Using string argument: bool(true) Is B a subclass of B? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is B a subclass of C? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is B a subclass of I? - Using ReflectionClass object argument: bool(false) - Using string argument: bool(false) Is B a subclass of X? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is C a subclass of A? - Using ReflectionClass object argument: bool(true) - Using ReflectionObject object argument: bool(true) - Using string argument: bool(true) Is C a subclass of B? - Using ReflectionClass object argument: bool(true) - Using ReflectionObject object argument: bool(true) - Using string argument: bool(true) Is C a subclass of C? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is C a subclass of I? - Using ReflectionClass object argument: bool(false) - Using string argument: bool(false) Is C a subclass of X? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is X a subclass of A? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is X a subclass of B? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is X a subclass of C? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false) Is X a subclass of I? - Using ReflectionClass object argument: bool(true) - Using string argument: bool(true) Is X a subclass of X? - Using ReflectionClass object argument: bool(false) - Using ReflectionObject object argument: bool(false) - Using string argument: bool(false)