Question

我正在关注CRUD的教程。实际上我在删除功能，但是我无法使删除功能起作用。

每次按下删除按钮时都会出现错误。

如果有人帮我解决以下错误，我会很高兴：

注意：未定义的索引：第17行的C：\ wamp \ www \ member \ index.php中的id

这是我的index.php的代码

<!DOCTYPE html>
<html>
<head>
	<title> Delete Record</title>
</head>
<body>

<?php 
	//include database configuration
	include 'config.php';

	//check if the action is complete, we use GET this time since we get the action data from the url
	isset($_GET['action']) ? $action = $_GET['action'] : $action='';

	if($action == 'delete') { //if the user clicked OK, run our delete query

		$id = $_REQUEST['id'];

		$query = mysqli_query($conn, "DELETE FROM user WHERE id='$id'") or die(mysqli_error($conn));

		if($query){ //this will display when the query was successful

			echo "<div>Record was deleted.</div>";
		}
	}

	// selecting records 
	$query2 = mysqli_query($conn, "SELECT * FROM user") or die(mysqli_error($conn));

	// count how many records found
	$num = mysqli_num_rows($query2);

	if($num > 0){ //check if more that o records found
			echo "<table border='1'>"; //start table

			//creating table heading
			echo "<tr>";
			echo "<th>First Name</th>";
			echo "<th>Last Name</th>";
			echo "<th>User Name</th>";
			echo "<th>Action</th>"; //we're gonna add this fpr delete action
			echo "<th>Edit Action</th>";
			echo "</tr>";

		//retrieve our table content
			while($row = mysqli_fetch_array($query2)){
				//extract raw
				//this will make $row['firstname'] to
				//just $firstname only

				extract ($row);

		//creating new table row per record
				echo "<tr>";
				echo "<td>{$firstname}</td>";
				echo "<td>{$lastname}</td>";
				echo "<td>{$username}</td>";

				//we have the delete link here, you can also put your edit link here
				echo "<td>";
				echo "<a href='#' onclick='delete_user({$id});'>Delete</a>";
				echo "</td>";
				echo "<td>";
				echo "<a href='edit.php?id=<?php echo $id; ?>'>Edit</a>";
				echo "</td>";
				echo "</tr>";

			}
			echo "</table>"; //end of table

	}else{ //if no records found

		echo "<div>No Records Found</div>";
	}

 ?>

 <script type="text/javascript">
 	function delete_user(id){
 		//this script help us to 
 		var answer = confirm('are you sure?');

 		if (answer){ //if clicked OK
 			//redirect to url with action as delete and id recoord to be deleted

 			window.location = 'index.php?action=delete&id' + id;

 		}
 	}

 </script>

</body>
</html>

Answer 1

你有一个错字：

window.location = 'index.php?action=delete&id' + id;

应该是：

window.location = 'index.php?action=delete&id=' + id;

注意：未定义的索引：第17行的C：\ wamp \ www \ member \ index.php中的id

1 个答案: