Online PHP editor | refs for pShio

<?php $arr=array( array('amount'=>100,'date'=>'2014-03-29'), array('amount'=>200,'date'=>'2014-03-31'), array('amount'=>120,'date'=>'2014-03-30'), ); $total = 0; //以日期递增排序 uasort($arr, function($a, $b) { return strtotime($a['date']) - strtotime($b['date']); }); array_walk_recursive($arr, function(&$val, $key) use (&$total) { if ($key === 'amount') { $total += $val; $val = $total; } });var_dump($arr);