Mysql循环返回不正确的数据

Question

大家下午好，

我遇到了一个问题，无法弄清楚我在 myslq/php while/foreach 循环中做错了什么。

循环似乎在重复结果。

////////////////////////Check which site have this app///////////////////
$query_t = "SELECT * FROM site WHERE app_id='2'";
$result_t = mysql_query($query_t) or die(mysql_error());

$rows = array();     
while($r_t = mysql_fetch_array($result_t))
    $rows[] = $r_t;
foreach($rows as $r_t){ 

$this_areport_site_id = $r_t['site_id'];

  //////////////Search for user emails that have access to this app ////////
 $query_t4 = "SELECT mail FROM $user_tbl WHERE arep_kitchen='1' AND site_id='$this_areport_site_id' ORDER BY id ASC";
 $result_t4 = mysql_query($query_t4);

 while ($r_t4 = mysql_fetch_array($result_t4)) {
    $areport_kitchen_email .= $r_t4[mail].',';// append comma after each value you append to the string

 }

echo 'Here: '.$this_areport_site_id.' - '.$areport_kitchen_email.'<br />';

     }

现在它确实返回了以下内容：

Here: AHROW - person1@email.com,
Here: AHROW - person1@email.com,person2@email.com,
Here: AHALEX - person1@email.com,person2@email.com,person3@email.com,

我期待

Here: AHROW - person1@email.com,person2@email.com,
Here: AHLANG - No Records here
Here: AHALEX - person3@email.com,

当我整个上午都坐在那儿时，我会很感激建议我做错了什么。

Answer 1

我已经解决了这个问题，方法是在另一个循环中执行两个循环并从逗号分隔的字符串中退出，这在第一篇文章中似乎是一个问题。

Bozzy，谢谢你的努力。

$query_t7 = "SELECT * FROM site WHERE app_id='2'";
$result_t7 = mysql_query($query_t7) or die(mysql_error());
while($r_t7 = mysql_fetch_array($result_t7)) {

$this_areport_site_id = $r_t7['site_id'];

$query_t8 = "SELECT * FROM admins WHERE arep_kitchen='1' AND site_id='$this_areport_site_id' ORDER BY id ASC";
$result_t8 = mysql_query($query_t8) or die(mysql_error());
while($r_t8 = mysql_fetch_array($result_t8)) {

$areport_kitchen_email = $r_t8['mail'];

}
}

Answer 2

您应该在向其附加电子邮件之前清空字符串$areport_kitchen_email：

$areport_kitchen_email = ''; // empty emails container string

while ($r_t4 = mysql_fetch_array($result_t4)) {
   $areport_kitchen_email .= $r_t4[mail].',';// append comma after each value you append to the string
}

这样可以避免重复。