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<?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); } } $array = array('foo' => ''); echo "ArrayObject: empty string is set, but empty:\n"; $object = new ArrayObject($array); var_dump(isset($object['foo']), empty($object['foo']), $object->offsetExists('foo')); echo "ArrayObject extended: empty string is set, but not empty\n"; $object = new ArrayObjectChild($array); var_dump(isset($object['foo']), empty($object['foo']), $object->offsetExists('foo'));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of ArrayObjectChild::offsetExists($offset) should either be compatible with ArrayObject::offsetExists(mixed $key): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/DmQOU on line 5 Deprecated: Return type of ArrayObjectChild::offsetGet($offset) should either be compatible with ArrayObject::offsetGet(mixed $key): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/DmQOU on line 10 ArrayObject: empty string is set, but empty: bool(true) bool(true) bool(true) ArrayObject extended: empty string is set, but not empty string(38) "Called: ArrayObjectChild::offsetExists" string(38) "Called: ArrayObjectChild::offsetExists" string(35) "Called: ArrayObjectChild::offsetGet" string(38) "Called: ArrayObjectChild::offsetExists" bool(true) bool(true) bool(true)

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