dspx15491 2013-04-02 17:23
浏览 19
已采纳

使用MySQL数据库PHP中的计数填充List

I am trying to create a list based off of results selected with a wildcard from a column in a MySQL database. I am able to do it, however it seems very slow, and probably the wrong way. Here is the code I am tinkering with now

$optarr = array("leather", "cruise", "tint", "sunroof", "moonroof", "navigation", "antilock");
 foreach ($optarr as $i) {
    $refquery = "SELECT stock, COUNT(stock) FROM vehicle_list AND options LIKE '%$i%'"; 
    $refresult = mysql_query($refquery) or die(mysql_error());
    $row = mysql_fetch_array($refresult);

    if ($row['COUNT(stock)'] != '0') {
    echo "".ucfirst($i)." (".$row['COUNT(stock)'].")<br />";
    }
}

This will output the following

Leather(234)
Cruise(343)
Tint(231)
Sunroof(343)
.....

This list will eventually be around 20-30 different filter options, right now at 4-5 I can see a substantial delay. I'm doing something wrong, Just don't know what. Maybe the entire approach?

The options column in the Database is an entire block of text separated by @ symbols so I am using the Like wildcard to extract vehicle options.

Thanks!

  • 写回答

5条回答 默认 最新

  • dongwei2610 2013-04-02 17:26
    关注

    Make the database call prior to the foreach loop. This is calling the database on each loop and will be slow as expected.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(4条)

报告相同问题?

悬赏问题

  • ¥15 对于这个问题的代码运行
  • ¥50 三种调度算法报错 有实例
  • ¥15 关于#python#的问题,请各位专家解答!
  • ¥200 询问:python实现大地主题正反算的程序设计,有偿
  • ¥15 smptlib使用465端口发送邮件失败
  • ¥200 总是报错,能帮助用python实现程序实现高斯正反算吗?有偿
  • ¥15 对于squad数据集的基于bert模型的微调
  • ¥15 为什么我运行这个网络会出现以下报错?CRNN神经网络
  • ¥20 steam下载游戏占用内存
  • ¥15 CST保存项目时失败