PHP 多维数组 根据字段排序

这个太常用了，记录下、方便后面用/**
* @param $arr [要排序的数组]
* @param $condition [要排序的条件, for array('id'=>SORT_DESC,'add_time'=>SORT_ASC)]
* @return bool|mixed
* 对二维数组多个字段排序
*/
function SortArrByManyField($arr,$condition)
{
if (empty($condition)) {
return false;
}
$temp = array();
$i = 0;
foreach ($condition as $key => $ar) {
foreach ($arr as $k => $a) {
$temp[$i][] = $a[$key];
}
$i += 2;
$temp[] = $arr;
}
$temp =& $arr;
call_user_func_array('array_multisort', $temp);
return array_pop($temp);
}