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<?php class IssetArray extends \ArrayObject { public function &offsetGet($offset) { $var = $this->offsetExists($offset) ? parent::offsetGet($offset) : null; return $var; } } $array = new \IssetArray(); $array['item'] = 123; var_dump($array['item']); var_dump($array['item']['foo']); var_dump($array['something']['noItem']); $array['something']['foo'] = 'bar'; var_dump($array['something']['foo']);

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