需要帮助使用PHP和MYSQL实现简单的东西

Question

这是我的代码 -

<?php 

$u = $_SESSION['username'];
while($fetchy = mysqli_fetch_array($allusers))
{

mysqli_select_db($connect,"button");
$select = "select * from button where sessionusername='$u' AND response = 'approve'";
$query = mysqli_query($connect,$select) or die('Oops, Could not connect');
$result= mysqli_fetch_array($query);
$email = mysqli_real_escape_string($connect,trim($result['onuser']));
echo $email; 

if($email){
    mysqli_select_db($connect,"users");
    $select_name = "select name, icon from profile where email = '$email'";
$query_2 = mysqli_query($connect,$select_name) or die('Oops, Could not connect. Sorry.');
$results= mysqli_fetch_array($query_2);
$name = mysqli_real_escape_string($connect,trim($results['name']));
$icon = mysqli_real_escape_string($connect,trim($results['icon']));
echo $name;
}

}

不，db中有两个响应。 因此，有两个名字得到回应，但它们都是相同的。 为什么这样？ 例如

DB - NAMEs - Apple和Orange。

显示 - Apple Apple。

数据库示例 -

SESSIONUSERNAME      OnUSer

s@s.com              apple
s@s.com              orange

EDITED

使用@ endophage的方法 -

AppleOrange和AppleOrange。

Answer 1

正如你的循环现在一样， $u将永远是相同的，因此$select将始终具有相同的值，因此$email也是如此，因此$select_name也是如此，因此同样的记录不断回归也就不足为奇了。

编辑

如果$select_name查询返回多个结果，那么您需要像其他查询一样使用while循环遍历结果。

Answer 2

试试这个，你的while循环在错误的地方：

<?php 

$u = $_SESSION['username'];


mysqli_select_db($connect,"button");
$select = "select * from button where sessionusername='$u' AND response = 'approve'";
$query = mysqli_query($connect,$select) or die('Oops, Could not connect');
while($result = mysqli_fetch_array($query))
{
  $email = mysqli_real_escape_string($connect,trim($result['onuser']));
  echo $email; 

  if($email){
      mysqli_select_db($connect,"users");
      $select_name = "select name, icon from profile where email = '$email'";
      $query_2 = mysqli_query($connect,$select_name) or die('Oops, Could not connect. Sorry.');
      $results= mysqli_fetch_array($query_2);
      $name = mysqli_real_escape_string($connect,trim($results['name']));
      $icon = mysqli_real_escape_string($connect,trim($results['icon']));
      echo $name;
  }
}