Online PHP editor | output for 7fVc4

<?php class Foo extends \ArrayIterator { } $fooReflection = new \ReflectionClass(\Foo::class); $recursiveArrayIteratorReflection = new \ReflectionClass(\RecursiveArrayIterator::class); printf("%d constants in %s, ", count($fooReflection->getConstants()), \Foo::class); if ($fooReflection->getParentClass()) { printf("%s extends %s\n", Foo::class, $fooReflection->getParentClass()->getName()); } printf("%d constants in %s, ", count($recursiveArrayIteratorReflection->getConstants()), \RecursiveArrayIterator::class); if ($recursiveArrayIteratorReflection->getParentClass()) { printf("%s extends %s\n", \RecursiveArrayIterator::class, $recursiveArrayIteratorReflection->getParentClass()->getName()); } printf("%d constants in %s\n", count((new \ReflectionClass(\ArrayIterator::class))->getConstants()), \ArrayIterator::class);