Question

$mp = array(
array('url'=>'www.abc.com','time'=>'1433551154','referral_url'=>'www.pqr.com'),
array('url'=>'www.xyz.com','time'=>'1433551150','referral_url'=>'www.stu.com'),
array('url'=>'www.lmn.com','time'=>'1433551190','referral_url'=>'www.jhi.com'),
array('url'=>'www.rst.com','time'=>'1433551170','referral_url'=>'www.pqr.com')
);

以上是输入数组，我需要按时间排序输出，并通过referral_url输出唯一。

结果将是 -

$mp = array(
array('url'=>'www.lmn.com','time'=>'1433551190','referral_url'=>'www.jhi.com'),
array('url'=>'www.rst.com','time'=>'1433551170','referral_url'=>'www.pqr.com'),
array('url'=>'www.lmn.com','time'=>'1433551150','referral_url'=>'www.stu.com'),
);

请记住首先按时间排序，然后通过referral_url删除副本。

我的代码，我试过的 -

public function unique_sort($arrs, $id) {
    $unique_arr = array();
    foreach ($arrs AS $arr) {

        if (!in_array($arr[$id], $unique_arr)) {
            $unique_arr[] = $arr[$id];
        }
    }
    sort($unique_arr);
    return $unique_arr;
} 
foreach($mp as $key => $row){
        $referral_url[$key]  = $row['referral_url'];
        $time[$key] = $row['time'];
        $url[$key] = $row['url'];
    }
array_multisort($time, SORT_DESC, $mp);
$sort_arr = $this->unique_sort($mp, 'referral_url');
print_R($uniqueArray);exit;

但这只会导致我推荐_url -

Array(
[0] => www.jhi.com
[1] => www.pqr.com
[2] => www.stu.com
)

我需要以上定义的输出。

请建议方式。提前谢谢。

Answer 1

试试这个

$mp = array(
array('url'=>'www.abc.com','time'=>'1433551154','referral_url'=>'www.pqr.com'),
array('url'=>'www.xyz.com','time'=>'1433551150','referral_url'=>'www.stu.com'),
array('url'=>'www.lmn.com','time'=>'1433551190','referral_url'=>'www.jhi.com'),
array('url'=>'www.rst.com','time'=>'1433551170','referral_url'=>'www.pqr.com')
);
uasort($mp,function($a,$b){
    return $b['time'] - $a['time'];
});

foreach($mp as $value){
    $hash = $value['referral_url'];
    if(!isset($result[$hash])){
       $result[$hash] = $value;
    }
}
print_r(array_values($result));

说明：

使用uasort根据时间对数组进行排序，这将导致后面的数组

Array
(
    [2] => Array
        (
            [url] => www.lmn.com
            [time] => 1433551190
            [referral_url] => www.jhi.com
        )

    [3] => Array
        (
            [url] => www.rst.com
            [time] => 1433551170
            [referral_url] => www.pqr.com
        )

    [0] => Array
        (
            [url] => www.abc.com
            [time] => 1433551154
            [referral_url] => www.pqr.com
        )

    [1] => Array
        (
            [url] => www.xyz.com
            [time] => 1433551150
            [referral_url] => www.stu.com
        )

)

在foreach循环内，制作一个包含唯一 referral_url的值数组，这将导致以下数组

Array
(
    [www.jhi.com] => Array
        (
            [url] => www.lmn.com
            [time] => 1433551190
            [referral_url] => www.jhi.com
        )

    [www.pqr.com] => Array
        (
            [url] => www.rst.com
            [time] => 1433551170
            [referral_url] => www.pqr.com
        )

    [www.stu.com] => Array
        (
            [url] => www.xyz.com
            [time] => 1433551150
            [referral_url] => www.stu.com
        )

)

最后使用array_values表示只有整数键的值

Fiddle

多维数组排序和键 - PHP唯一

1 个答案: