PHP 二维数组根据某个字段排序

$arr = array(); $arr[] = array('name' => 'a', 'flag' => 3); $arr[] = array('name' => 'b', 'flag' => 2); $arr[] = array('name' => 'c', 'flag' => 1); $flag = array(); foreach ($arr as $key => $value) { $flag[] = $value['flag']; } array_multisort($flag,SORT_ASC,$arr); echo "
";
    var_dump($arr);
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