php 多维数组的排序实现代码

Array
(
   [0] => Array
       (
           [id] => 1146
           [orderid] => 3
       )

   [1] => Array
       (
           [id] => 1149
           [orderid] => 2
       )

   [2] => Array
       (
           [id] => 170
           [orderid] => 4
       )

   [3] => Array
       (
           [id] => 1121
           [orderid] => 3
       )

   [4] => Array
       (
           [id] => 1120
           [orderid] => 7
       )

)

$asc_func  =  create_function('$a,$b',' 
$k  =  "orderid";
if($a[$k]  ==  $b[$k])  return  0; 
return  $a[$k]>$b[$k]?1:-1; 
'); 
usort($arrs,$asc_func); 

function sysSortArray($ArrayData,$KeyName1,$SortOrder1 = "SORT_ASC",$SortType1 = "SORT_REGULAR")
{
    if(!is_array($ArrayData))
    {
        return $ArrayData;
    }

    // Get args number.
    $ArgCount = func_num_args();

    // Get keys to sort by and put them to SortRule array.
    for($I = 1;$I < $ArgCount;$I ++)
    {
        $Arg = func_get_arg($I);
        if(!eregi("SORT",$Arg))
        {
            $KeyNameList[] = $Arg;
            $SortRule[]    = '$'.$Arg;
        }
        else
        {
            $SortRule[]    = $Arg;
        }
    }

    // Get the values according to the keys and put them to array.
    foreach($ArrayData AS $Key => $Info)
    {
        foreach($KeyNameList AS $KeyName)
        {
            ${$KeyName}[$Key] = $Info[$KeyName];
        }
    }

    // Create the eval string and eval it.
    $EvalString = 'array_multisort('.join(",",$SortRule).',$ArrayData);';
    eval ($EvalString);
    return $ArrayData;
}