PHP排序多维数组基于多个标准

Question

我有一个多维数组，看起来像:

$arr=Array
(
    [0] => Array
        (
            [0] => TEAM1
            [1] => 3
            [2] => 0
            [3] => 422.47
            [4] => 192.62
        )
    [1] => Array
        (
            [0] => TEAM2
            [1] => 2
            [2] => 1
            [3] => 402.14
            [4] => 210.70
        )
    [2] => Array
        (
            [0] => TEAM3
            [1] => 3
            [2] => 0
            [3] => 376.79
            [4] => 174.64
        )
)

这5列分别是球队名、#胜、#负、#得、#负。

我如何排序$arr列1 (# Wins)(降序)，然后列2 (# Losses)(升序)，然后列3 (# of Pts For)(降序)

Answer 1

我找到了一个使用array_multisort()的解决方案

foreach ($arr as $key => $row) {
    $wins[$key] = $row[1]; 
    $losses[$key] = $row[2];
    $ptsfor[$key] = $row[3];
}
array_multisort($wins, SORT_DESC, $losses, SORT_ASC, $ptsfor, SORT_DESC, $arr);

Answer 2

您可以简单地使用usort函数，如

usort($arr, function($a,$b){
    if($a[1] != $b[1])
        return $b[1] - $a[1];
    else if($a[2] != $b[2])
        return $a[2] - $b[2];
    else if($a[3] != $b[3])
        return $b[3] - $a[3];
});

也可以像

一样使用

usort($arr,function($a,$b){
    $c = $b[1] - $a[1];
    $c .= $a[2] - $b[2];
    $c .= $b[3] - $a[3];
    return $c;
});

Answer 3

你可以使用这个函数

    function sort_array($array, $sortkey, $order)
    {
        if ($order == "DESC")
            $or = "arsort";
        else
            $or = "asort";
        foreach ($array as $key => $array_row)
        {
            $sort_values[$key] = $array_row[$sortkey];
        }
        $or($sort_values);
        reset($sort_values);
        while (list ($arr_key, $arr_val) = each($sort_values))
        {
            $sorted_arr[] = $array[$arr_key];
        }
        return $sorted_arr;
    }