Created
August 26, 2017 17:17
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SafeNullClass.php
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| <?php | |
| /** | |
| * Created by PhpStorm. | |
| * User: kwant | |
| * Date: 26.08.17 | |
| * Time: 19:50 | |
| * | |
| * attempt to create NullObject in php | |
| * this object does nothing | |
| * also this object doesn't throw any error | |
| * | |
| * | |
| */ | |
| class SafeNullClass implements Countable, IteratorAggregate, ArrayAccess, JsonSerializable | |
| { | |
| public function __construct(){} | |
| function __call($name, $arguments){} | |
| public static function __callStatic($name, $arguments){} | |
| function __get($name){} | |
| function __set($name, $value){} | |
| function __isset($name) | |
| { | |
| return false; | |
| } | |
| function __unset($name){} | |
| function __toString() | |
| { | |
| return ""; | |
| } | |
| function __invoke(){} | |
| public function getIterator() | |
| { | |
| return new EmptyIterator(); | |
| } | |
| public function offsetExists($offset) | |
| { | |
| return false; | |
| } | |
| public function offsetGet($offset){} | |
| public function offsetSet($offset, $value){} | |
| public function offsetUnset($offset){} | |
| public function count() | |
| { | |
| return 0; | |
| } | |
| function jsonSerialize() | |
| { | |
| return null; | |
| } | |
| } |
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| <?php | |
| /** | |
| * Created by PhpStorm. | |
| * User: kwant | |
| * Date: 26.08.17 | |
| * Time: 20:11 | |
| * | |
| * recursive version of NullObject | |
| * you can also write someting like | |
| * $null->property->getIt()['key']->yay()['x']; | |
| * without getting any errors | |
| * | |
| */ | |
| class SafeNullClassRecursive extends SafeNullClass | |
| { | |
| public function __get($name) | |
| { | |
| return $this; | |
| } | |
| public function offsetGet($offset) | |
| { | |
| return $this; | |
| } | |
| public function __call($name, $arguments) | |
| { | |
| return $this; | |
| } | |
| public function __invoke() | |
| { | |
| return $this; | |
| } | |
| } |
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