Question

我想通过其中一个列对2D数组进行排序...例如：

$a = array(
    'user4' => array('name' => 'u4', 'payment' => 1000, 'time' => 5000),
    'user2' => array('name' => 'u2', 'payment' => 2000, 'time' => 5000),
    'user3' => array('name' => 'u3', 'payment' => 2000, 'time' => 3000),
);

我希望按payment（DESC）和time（ASC）对其进行排序。所以排序的数组应该是这样的：

$a = array(
    'user3' => array('name' => 'u3', 'payment' => 2000, 'time' => 3000),
    'user2' => array('name' => 'u2', 'payment' => 2000, 'time' => 5000),
    'user4' => array('name' => 'u4', 'payment' => 1000, 'time' => 5000),
);

怎么做？谢谢，

我找到了解决方案：

    foreach ($a as $key => $row) {
        $payment[$key]  = $row['payment'];
        $time[$key] = $row['time'];
    }

    array_multisort($payment, SORT_DESC, $time, SORT_ASC, $a);

来源：http://php.net/manual/en/function.array-multisort.php

Answer 1

您可以使用usort：

$arr = array(
    'user4' => array('name' => 'u4', 'payment' => 1000, 'time' => 5000),
    'user2' => array('name' => 'u2', 'payment' => 2000, 'time' => 5000),
    'user3' => array('name' => 'u3', 'payment' => 2000, 'time' => 3000),
);

function mySort($a,$b) {
    if ($a['payment'] == $b['payment']) {
        return $a['time'] - $b['time'];
    } else {
        return $b['payment'] - $a['payment'];
    }
}
usort($arr, 'mySort');
print_r($arr);

<强>输出：

Array
(
    [0] => Array
        (
            [name] => u3
            [payment] => 2000
            [time] => 3000
        )

    [1] => Array
        (
            [name] => u2
            [payment] => 2000
            [time] => 5000
        )

    [2] => Array
        (
            [name] => u4
            [payment] => 1000
            [time] => 5000
        )

)

Answer 2

Yes usort就是答案。在我看来，PHP array_multisort表现得很奇怪，强迫你将自然格式化的表数据分解成单独的数组。

这是一个用于表格数据格式化多维数组的多列排序的简单解决方案。

http://pastebin.com/9vCy1jxH

按2列排序多维数组

2 个答案: