Online PHP editor | refs for HGPBG

<?php class ArrayObjectChild extends ArrayObject { public function offsetExists($offset) { var_dump('Called: '.__METHOD__); return parent::offsetExists($offset); } public function offsetGet($offset) { var_dump('Called: '.__METHOD__); return parent::offsetGet($offset); } } class ArrayAcessImplementation implements ArrayAccess { private $_array = array(); public function __construct(array $array) { $this->_array = $array; } public function offsetExists($offset) { var_dump('Called: '.__METHOD__); return array_key_exists($offset); } public function offsetGet($offset) { var_dump('Called: '.__METHOD__); return $this->_array($offset); } public function offsetSet($offset, $value) {} public function offsetUnset($offset) {} } $array = array('foo' => ''); // ArrayObject: empty string is set, but empty $object = new ArrayObject($array); var_dump(isset($object['foo']), empty($object['foo'])); // ArrayObject extended: empty string is set, but not empty $object = new ArrayObjectChild($array); var_dump(isset($object['foo']), empty($object['foo'])); // ArrayAccess implemented: empty string is set, but empty $object = new ArrayAcessImplementation($array); var_dump(isset($object['foo']), empty($object['foo']));