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<?php class Thing extends ArrayObject { public function __construct(array $data) { parent::__construct($data, self::ARRAY_AS_PROPS); } public function offsetSet($index, $value) { parent::offsetSet($index, $value); return $this; } public function offsetGet($index) { if ($this->offsetExists($index)) { return parent::offsetGet($index); } return null; } } $test = new Thing([]); $test->dynamic['key'] = ['is-set' => 'up to 7.1.3']; var_dump($test);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Thing::offsetGet($index) should either be compatible with ArrayObject::offsetGet(mixed $key): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/LQdPJ on line 15 Deprecated: Return type of Thing::offsetSet($index, $value) should either be compatible with ArrayObject::offsetSet(mixed $key, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/LQdPJ on line 10 object(Thing)#1 (1) { ["storage":"ArrayObject":private]=> array(0) { } }

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