Question

我有一个网站，其中有一个表单，可以将数据提交到数据库，还会向电子邮件地址发送一封电子邮件地址，该地址在URL的末尾有一个随机ID，用于提取特定数据并将其显示在网页。基本上它是我正在做的情人节消息类型

我已经将数据发送到数据库并存储完美，但由于某些奇怪的原因，我在处理数据方面存在问题。

这是我的代码，您可以看到可能导致问题的任何内容吗？

<?php

// since the id is being passed in the url, you will need to declare it using the get method
$rand = $_GET['rand'];
$action = $_GET['action'];

// if an id was sent to the script, then execute it
if ($rand)
{
   // connection vars
   $host = "localhost";
   $user = "***";
   $password = "***";
   $dbname = "***";
   $tablename = "cards";


   $mysql = new mysqli('$host, $user, $password');
   $result = $mysql->query('SELECT * FROM $tablename WHERE rand = $rand');

   while (($row = $result->fetch_assoc()) !== null) {
      print_r($row);

      $youremail = urlencode($row['youremail']);
      $name = urlencode($row['name']);
      $receiveremail = urlencode($row['receiveremail']);
      $message = $row['message'];

      // replace non flash line breaks with the flash \r newline
      $message = str_replace('\n', '\r', $message);
      $message = str_replace('\r\n', '\r', $message);
      $message = str_replace('<br>', '\r', $message);
      $message = str_replace('%0D%0A', '\r', $message);

   }

   // if there was a result echo the stuff below
   if($result)
   {
      // if we have a result we can show the movie and pass the vars along in the strings
  // a set back with this is that you can only pass so much data in the string, think its like 256 characters, but Im not sure.

      echo "Hello, $name <br />";
      echo "$message";
      exit();
   }
   mysql_close();
}
?>

Answer 1

您可以尝试此查询。

"SELECT * FROM $tablename WHERE rand = '$rand'"代替'SELECT * FROM $tablename WHERE rand = $rand'

如果它不工作，请检查您的表名，字段名称和变量。

Answer 2

我会将其更改为以下代码。

更改了isset，while ...循环并删除了对$result的错误检查。我还删除了您正在使用的urlencode的调用，因为如果您要在屏幕上显示这些值，它们没有任何意义。在编码要在URL的查询部分中使用的字符串时，该函数很方便，这是将变量传递到下一页的便捷方式。请参阅here。

最后，在new mysqli()来电中删除这些引号。

<?php

// since the id is being passed in the url, you will need to declare it using the get method
$action = $_GET['action'];

// if an id was sent to the script, then execute it
if (isset($_GET['rand'])) {
   $rand = $_GET['rand'];

   // connection vars
   $host = "localhost";
   $user = "***";
   $password = "***";
   $dbname = "***";
   $tablename = "cards";

   $mysql = new mysqli($host, $user, $password, $dbname);

   /* check connection */
   if (mysqli_connect_errno()) {
      printf("Connect failed: %s\n", mysqli_connect_error());
      exit();
   }

   $result = $mysql->query("SELECT * FROM $tablename WHERE rand = '$rand'");

   while ($row = $result->fetch_assoc()) {
      print_r($row);

      $youremail = $row['youremail'];
      $name = $row['name'];
      $receiveremail = $row['receiveremail'];
      $message = $row['message'];

      // replace non flash line breaks with the flash \r newline
      $message = str_replace('\n', '\r', $message);
      $message = str_replace('\r\n', '\r', $message);
      $message = str_replace('<br>', '\r', $message);
      $message = str_replace('%0D%0A', '\r', $message);

      echo "Hello, $name<br />";
      echo $message;

   }
}
?>

没有从数据库中提取任何东西

2 个答案: