PHP / MySQL删除记录不会删除

Question

This is driving me crazy! 这真让我抓狂！ I have a webpage called course listing where I am using PHP to create a HTML table listing the courses stored in a MySQL database (using Wampserver) 我有一个名为课程表的网页，我在其中使用PHP创建一个HTML表，该表列出了存储在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>

and this prints out a nice HTML table with all the data correctly in it, and a row on the right with the word Delete which is a hyperlink and should allow me to delete a course. 这会打印出一个漂亮的HTML表格，其中正确包含了所有数据，并且在右侧一行显示了单词Delete（是超链接），应该允许我删除课程。 But when I click Delete, it doesn't Delete! 但是，当我单击“删除”时，它不会被删除！ Here is my deletecourse.php. 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");
?>

This is super frustrating because I have the exact same example working for a different database... I've just switched out all the variable names, but essentially the logic and syntax and everything is the same! 这让我非常沮丧，因为我有一个完全相同的示例在另一个数据库上工作...我刚刚切换了所有变量名，但是从本质上讲逻辑和语法都一样！

Answer 1

Surround it with single quotes like this: 用单引号将其括起来，如下所示：

$query = "DELETE FROM course WHERE coursecode='" . $coursecode . "'";

$query = "DELETE FROM course WHERE coursecode='{$coursecode}'";

PHP / MySQL删除记录不会删除

问题描述

1 个解决方案

解决方案1
2 已采纳 2015-01-24 11:06:40

PHP / MySQL删除记录不会删除

问题描述

1 个解决方案

解决方案1 2 已采纳 2015-01-24 11:06:40

解决方案1
2 已采纳 2015-01-24 11:06:40