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<?php class Parameters extends ArrayObject { public function __construct(array $values = null) { if (null === $values) { $values = array(); } parent::__construct($values, ArrayObject::ARRAY_AS_PROPS); } public function offsetGet($name) { if (isset($this[$name])) { return parent::offsetGet($name); } return null; } } $x = new Parameters(); var_dump($x['foo']); $x['foo'] = 'bar'; var_dump($x['foo']);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Parameters::offsetGet($name) should either be compatible with ArrayObject::offsetGet(mixed $key): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/oAs01 on line 9 NULL string(3) "bar"

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