[英]PHP/MySQL Delete Record doesn't Delete
這真讓我抓狂! 我有一個名為課程表的網頁,我在其中使用PHP創建一個HTML表,該表列出了存儲在MySQL數據庫中的課程(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>
這會打印出一個漂亮的HTML表格,其中正確包含了所有數據,並且在右側一行顯示了單詞Delete(是超鏈接),應該允許我刪除課程。 但是,當我單擊“刪除”時,它不會被刪除! 這是我的deletecourse.php。
<?php
require "dbconn.php";
$coursecode = $_GET['coursecode'];
$query = "DELETE FROM course WHERE coursecode =".$coursecode;
$results = $connect->query($query);
header("Location: courselisting.php");
?>
這讓我非常沮喪,因為我有一個完全相同的示例在另一個數據庫上工作...我剛剛切換了所有變量名,但是從本質上講邏輯和語法都一樣!
用單引號將其括起來,如下所示:
$query = "DELETE FROM course WHERE coursecode='" . $coursecode . "'";
$query = "DELETE FROM course WHERE coursecode='{$coursecode}'";
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