这让我抓狂!我有一个名为课程列表的网页,我使用PHP创建一个HTML表格,列出存储在MySQL数据库中的课程(使用Wampserver)
<?php
require "dbconn.php";
$query = "SELECT coursecode, coursename FROM course";
$results = $connect->query($query);
$numrow = $results->num_rows;
?>
<html>
<head></head>
<body>
<table border="1">
<?php
$count = 0;
while ($count < $numrow)
{
$row = $results->fetch_assoc();
extract($row);
echo "<tr>";
echo "<td>";
echo "<a href='updatecourseform.php?coursecode=".$coursecode."'>".$coursecode."</a>";
echo "<td>";
echo $row['coursename'];
echo "</td>";
echo "<td>";
echo "<a href='deletecourse.php?coursecode=".$coursecode."'>Delete</a>";
echo "</td>";
echo "</tr>";
$count = $count + 1;
}
?>
</table>
<br />
The number of courses found was: <?php echo $numrow; ?>
<br /><br />
Click <a href="addcourse.html">here</a> if you want to add a Course
</body>
</html>
这会打印出一个漂亮的HTML表格,其中包含正确的所有数据,右侧的一行带有Delete字样,这是一个超链接,应该允许我删除一个课程。但是当我点击删除时,它不会删除!这是我的deletecourse.php。
<?php
require "dbconn.php";
$coursecode = $_GET['coursecode'];
$query = "DELETE FROM course WHERE coursecode =".$coursecode;
$results = $connect->query($query);
header("Location: courselisting.php");
?>
这是非常令人沮丧的,因为我有一个完全相同的例子为不同的数据库工作...我刚刚关闭了所有的变量名,但基本上逻辑和语法和一切都是一样的!
答案 0 :(得分:2)
用这样的单引号包围它:
$query = "DELETE FROM course WHERE coursecode='" . $coursecode . "'";
$query = "DELETE FROM course WHERE coursecode='{$coursecode}'";