我有一个广告网站项目,用户可以在其中添加不同旅游相关业务的报价。我为每个报价创建了动态生成的页面,我想在其中添加一个评论框,访问者可以在其中发表他们的意见。该页面按原样生成,链接为 ads.php?id=2,其中 id 是该商品的 id。当我单击评论的提交按钮时,页面链接更改为advertisement.php?advertisement_comment=&place_comment=Place+comment,其中advertisement_comment 是评论框的名称,place_comment 是提交按钮的名称。因此,我在第 3 行收到通知:未定义索引:C:\xampp\htdocs\Project\advertisement.php 中的 id。我的 id 变量等于 $_GET['id'] 但由于页面 url 发生变化,它不能再得到它。有什么办法可以防止链接改变?如果不是,也许您可以想到一个不同的数据库结构和 php 代码,我可以用它们来到达我想要的地方,因为我有点卡住了。如果我需要在降级之前以任何方式编辑我的问题,请告诉我。非常感谢!
生成页面的代码:
<?php
session_start();
$id = $_GET['id'];
require_once("includes/db_connect.php");
$query_dynamic_advertisement = "SELECT * FROM advertisings WHERE id = '$id'";
$result_dynamic_advertisement = mysql_query($query_dynamic_advertisement) or die (mysql_error());
$fetch_dynamic_advertisement = mysql_fetch_assoc($result_dynamic_advertisement);
// Hit counter
$query_advertising_views="UPDATE advertisings SET advertising_views = advertising_views + 1 WHERE id = '$id'";
$result_advertising_views=mysql_query($query_advertising_views) or die (mysql_error());
// Comments
if (isset($_POST['place_comment']))
{
$comment = mysql_real_escape_string($_POST[advertisement_comment]);
$advertising_id = $_SESSION['id'];
$query_place_comment = "INSERT INTO advertising_comments VALUES ('', '$comment', '$advertising_id')";
mysql_query($query_place_comment) or die (mysql_error());
}
?>
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="css/style.css">
<title>Title</title>
</head>
<body>
<div id="wrapper">
</br>
<a href="index.php"><h3>Home</h3></a>
<a href="index.php"><img src="images/logo.png" alt="SporeDEV logo" id="logo"></a>
</br>
<!-- Meniu -->
<ul>
<li><a href="signup.php">Signup</a></li>
<li><a href="login.php">Login</a></li>
<li><a href="forgot_password.php">Forgot Password</a></li>
<li><a href="includes/logout.php">Logout</a></li>
<li><a href="advertising_panel.php">Advertising Panel</a></li>
<li><a href="user_panel.php">User Panel</a></li>
<li><a href="user_profile.php">User Profile</a></li>
<li><a href="admin_panel.php">Admin Panel</a></li>
</ul>
<!-- Sfarsit de meniu -->
</br>
<?php
echo "<p> General information </p>";
echo "</br>";
echo "Location name: {$fetch_dynamic_advertisement['location_name']}";
echo "</br>";
echo "Location type: {$fetch_dynamic_advertisement['location_type']}";
echo "</br>";
echo "</br>";
echo "</br>";
echo "<p> Address </p>";
echo "</br>";
echo "Region: {$fetch_dynamic_advertisement['region']}";
echo "</br>";
echo "Settlement: {$fetch_dynamic_advertisement['settlement']}";
echo "</br>";
echo "Street: {$fetch_dynamic_advertisement['street']}";
echo "</br>";
echo "Street number: {$fetch_dynamic_advertisement['street_number']}";
echo "</br>";
echo "</br>";
echo "</br>";
echo "<p> Contact information </p>";
echo "</br>";
echo "E-mail: {$fetch_dynamic_advertisement['email']}";
echo "</br>";
echo "Phone: {$fetch_dynamic_advertisement['phone']}";
echo "</br>";
echo "Website: <a href={$fetch_dynamic_advertisement['website']} target=_blank>{$fetch_dynamic_advertisement['website']}</a>";
echo "</br>";
echo "</br>";
echo "</br>";
echo "<p> Statistics </p>";
echo "</br>";
echo "Added: {$fetch_dynamic_advertisement['add_date']}";
echo "</br>";
echo "Modified: {$fetch_dynamic_advertisement['last_modified']}";
echo "</br>";
echo "Advertising views: {$fetch_dynamic_advertisement['advertising_views']}";
echo "</br>";
echo "</br>";
echo "</br>";
echo "<p> Description </p>";
echo "</br>";
echo "Description: {$fetch_dynamic_advertisement['description']}";
echo "</br>";
echo "</br>";
echo "</br>";
echo "<p> Comments </p>";
echo "</br>";
?>
<!-- Comment form -->
<p> Add a comment </p>
</br>
<form action = "advertisement.php?id=<?php echo $id;?>" method = "$_POST">
<textarea name="advertisement_comment"></textarea>
</br>
<input type="submit" name="place_comment" class="button_1" value="Place comment">
</form>
</div>
</body>
</html>
表advertising_comments的结构为:id(int 11, autoincrement),comment (varchar 255),advertising_id(int 11,这个应该和初始页面的id一样)。
我知道 MySQL 已经贬值了。如果你有时间,请检查这个问题:最简单的 MySQL 到 MySQLi 的转换