计算循环内的总行数 - count total num rows inside while loop

count total num rows inside while loop

本文关键字：循环计算 | 更新日期: 2023-09-27

我有这段代码：

  $i=0;
      $start_date = date("Y/m/d");
      $end_date = date('Y/m/d', strtotime($start_date . " -7 days"));

      while($days7=mysql_fetch_assoc($q)): 
          $next_date = strtotime($i--." days", strtotime($start_date));
          $date = date("Y/m/d",$next_date); 
      #Let's get the latest click combined from the latest 7 days
          $combined7=mysql_query("SELECT sum(value) FROM `xeon_stats_clicks` WHERE user='".$userdata['username']."' AND typ='4' AND data='$date' ORDER BY data DESC LIMIT 8") or die(mysql_error());              

      print mysql_num_rows($combined7);
      endwhile;

我需要查看该$combined7获得了多少行。目前，我正在使用print mysql_num_rows($combined7);但这只是打印出来：1 1 1 1 1（每行的数字"1"）

如何计算总数？

（附注：$i必须设置为 0）

简单：

$counter = 0;
while(..) {
      $counter++; // or $counter = $counter + 1;
}
echo $counter;

定义循环外部的变量。

这是您的原始查询：

          $combined7=mysql_query("SELECT sum(value) FROM `xeon_stats_clicks` WHERE user='".$userdata['username']."' AND typ='4' AND data='$date' ORDER BY data DESC LIMIT 8")

通过添加 COUNT 命令，它将计算SUM中考虑的行数：

SELECT SUM(value), COUNT(value) FROM...

然后，当您取回MYSQL_RESULT时，您需要获取数据：

$data = mysql_fetch_array($combined7);

然后，这将具有以下数组：

Array(
    [0] = SUM
    [1] = COUNT
)

注意：mysql_*已被弃用。请改用mysqli_*或PDO<</p>

div class="answers">我没有

正确理解你的问题..但我认为您想计算更新的总行

数

 $sum=0;
 while(){
 $sum += mysql_num_rows($combined7); //here it will add total upadted row in $sum...
 print $sum; // if you want to print every time total
 }
 print $sum; // if you want to print only one time total

您应该在 while 之前定义一个值为 0 的变量。然后在 while 内递增此变量的值。然后在 while 结束后打印此变量。

      $start_date = date("Y/m/d");
      $end_date = date('Y/m/d', strtotime($start_date . " -7 days"));
      $sn = 0;
      while($days7=mysql_fetch_assoc($q)): 
          $next_date = strtotime($i--." days", strtotime($start_date));
          $date = date("Y/m/d",$next_date); 
      #Let's get the latest click combined from the latest 7 days
          $combined7=mysql_query("SELECT sum(value) FROM `xeon_stats_clicks` WHERE user='".$userdata['username']."' AND typ='4' AND data='$date' ORDER BY data DESC LIMIT 8") or die(mysql_error());              

      $sn += mysql_num_rows($combined7);
      endwhile;
      print $sn;