PHP带键值的排序数组

Question

我不愿意用键值对数组进行排序。 有了这个下面的数组，我需要按site_category对其进行排序，并且需要输出如下

例：

Shopping
   Amazon
Social
   Amoeblo
   American express

数组值是

(
    [0] => stdClass Object
        (
            [site_id] => 1
            [site_name] => Amazon
            [site_img] => http://localhost/faves/resource/img/sites/icon/amazon.png
            [site_category] => Shopping
        )

    [1] => stdClass Object
        (
            [site_id] => 2
            [site_name] => Ameblo
            [site_img] => http://localhost/faves/resource/img/sites/icon/ameblow.png
            [site_category] => Social
        )

    [2] => stdClass Object
        (
            [site_id] => 3
            [site_name] => American Express
            [site_img] => http://localhost/faves/resource/img/sites/icon/americanexpress.png
            [site_category] => Social
        )


)

有什么解决的建议吗？

Answer 1

实际上是按子值对php多维数组进行排序的副本

function cmp($a, $b) {
        return $a->site_category - $b->site_category;
}
usort($arr, "cmp");

Answer 2

您可以使用foreach和ksort

让$ your_array为您上面提到的数组

$res_array    = array();
foreach($your_array as $val){
   $res_array[$val->site_category][] = $val->site_name;
}
ksort($res_array);

print_r($res_array);

或在php中搜索multisort，这将解决您的问题:)

Answer 3

$tmp = array();
$i = 0;

for($i=0;$i<count($carriers);$i++){

    for($j=$i+1;$j<count($carriers);$j++){

        if($carriers[$i]['price']>$carriers[$j]['price']){

            $tmp = $carriers[$i];
            $carriers[$i] = $carriers[$j];
            $carriers[$j] = $tmp;
        }
    }
}       
return $carriers;

这将按价格键对$carriers数组进行排序。