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<?php $arras = array('0' => array(array('0' => array(array('0' => array()))))); print_r($arras);
based on n1jBF
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => Array ( [0] => Array ( [0] => Array ( [0] => Array ( [0] => Array ( ) ) ) ) ) )