一个不错的PHP二维数组排序函数简单易用存用
传入数组，传入排序的键，传入排序顺序
public function array_sort($arr,$keys,$type='asc')
{
$keysvalue = $new_array = array();
foreach ($arr as $k=>$v){
$keysvalue[$k] = $v[$keys];
}
if($type == 'asc'){
asort($keysvalue);
}else{
arsort($keysvalue);
}
reset($keysvalue);
foreach ($keysvalue as $k=>$v){
$new_array[$k] = $arr[$k];
}
return $new_array;
}