PHP 二维数组排序

来源：互联网发布：java乘法表代码对齐编辑：程序博客网时间：2024/04/30 04:14

因为，在mysql4上不支持 group by 字段 order by 字段 desc ，在mysql5上，没问题！

所以，只能让我想别的办法，想呀想，郁闷了半天，

因为，买的虚拟主机是mysql4的，无语，所以想到二维数组排序！

以下是我的代码：

$sql_jj_clicks_count = "select zj_jj_id,sum(everynum) as clicks_num from zj_jj_clicks where s1='$sheng_bj' and s2='$shi_bj' group by zj_jj_id limit 0,10";
$result_jj_clicks_count = $h->sql($sql_jj_clicks_count);
while ($rs_jj_clicks_count = mysql_fetch_array($result_jj_clicks_count)) {
    $sql_jj_clicks_count_xx = "select jjtruename,href,shouji,zihao from zj_jj where id=".$rs_jj_clicks_count['zj_jj_id'];
    $result_jj_clicks_count_xx = $h->sql($sql_jj_clicks_count_xx);
    while ($rs_jj_clicks_count_xx = mysql_fetch_array($result_jj_clicks_count_xx)) {

        $array_jj_clicks_count[] = array("jjtruename"=>$rs_jj_clicks_count_xx['jjtruename'],"href"=>$rs_jj_clicks_count_xx['href'],"shouji"=>$rs_jj_clicks_count_xx['shouji'],"zihao"=>$rs_jj_clicks_count_xx['zihao'],"clicks_num"=>$rs_jj_clicks_count['clicks_num']);
    }

}

foreach ($array_jj_clicks_count as $key => $row) {
    $jjtruename[$key] = $row['jjtruename'];
    $href[$key] = $row['href'];
    $shouji[$key] = $row['shouji'];
    $zihao[$key] = $row['zihao'];
    $clicks_num[$key] = $row['clicks_num'];
}

array_multisort($clicks_num, SORT_DESC,$array_jj_clicks_count);
$smarty->assign("rs_jj_clicks_count",$array_jj_clicks_count);

实现的原因，参考了以下文章：

array_multisort() 对二维数组进行排序
数组$roughData，我们打算按照accurancy排序。

Array
(
    [0] => Array
        (
            [username] => 10yl
            [accuracy] => 0.00
        )

    [1] => Array
        (
            [username] => 11yl
            [accuracy] => 1.00
        )

    [2] => Array
        (
            [username] => 12yl
            [accuracy] => 0.00
        )

    [3] => Array
        (
            [username] => 13yl
            [accuracy] => 1.00
        )
)

方法：
（1）提取accuracy列数组

foreach ($roughData as $key => $row) {
$usernames[$key] = $row['username'];
$accuracy[$key] = $row['accuracy'];
}

（2）进行排序

array_multisort($accuracy, SORT_ASC,$roughData);

当print_r($roughData);后我们将得到一个按accuracy升序排序的二维数组