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run code in 300+ PHP versions simultaneously
<?php $pero = array('asd' => array('a' =>'erp', 'b' => 'bb'), 'aa' => array('b' => 'bb2','a' =>'erp2')); $res = array(); foreach($pero as &$val) { unset($val['a']); $res[] = $val; } print_r($pero); print_r($res); ?>

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42.02 ms | 402 KiB | 5 Q