Question

我在填充使用数据库中的值生成密钥的数组时遇到问题。数据库返回2行，第一行应该是键，第二行是该键的值。

这是我的代码：

$days = array();

if($query=db::query("select dayname(date_earned) as dayEarned, sum(downloads) as dayDownloaded
from perf_earnings
where date_earned between DATE_SUB(curdate(), INTERVAL 7 DAY) AND curdate()
group by dayEarned"))
    {
    while($row=$q->fetch_assoc()){
       $day = $row["dayEarned"];
       $dowSum = $row["dayDownloaded"];
       $days[$day] = $dowSum;
    }
}

我得到一个空数组。

我想得到的是：

array(
[Monday]=>230,
[Tuesday]=>500,
[Wednesday]=>340,
etc.
)

嗯，和往常一样，有一个愚蠢的错误，你不仔细阅读。我没有输入$ query，我想做fetch_assoc。

我写了＆＃34; $ q＆＃34;相反＆＃34; $ query＆＃34;。

非常感谢。

Answer 1

我觉得你的查询没有获得任何结果集第一件事
在orignial查询组中，需要 group by date_earned 而不是group by dayEarned
编写上述代码的更好方法是

<?php
      $qry = "SELECT dayname(date_earned) as dayEarned, sum(downloads) as dayDownloaded
             FROM perf_earnings
             WHERE date_earned between DATE_SUB(curdate(), INTERVAL 7 DAY)
             AND curdate()
             GROUP BY date_earned";

     $qid  = mysql_query($qry);
     if($qid->num_rows()){
       while($row = mysql_fetch_array($qid)){
          $day = $row["dayEarned"];
          $dowSum = $row["dayDownloaded"];
          $days[$day] = $dowSum;

       }
     }

?>

输入键，其值为数组

1 个答案: