我正在学习如何向站点添加论坛部分的教程,用户可以在其中发表评论,然后使用PHP和编辑它们MySQL。在数据库中发布评论绝对没问题,但是当我点击编辑时,$message = $_POST['message'];当我在页面上(也不是在文本框中)回显时不会打印出来,并且我收到错误消息Undefined index: message。请有人阐明我对未进入页面的消息的实际内容做错了什么edit-comments.php。论坛.php: <?php require 'header.php'; date_default_timezone_set('Europe/London'); include 'comments.php'; $studentID = $_SESSION['studentID']; echo "<form method='POST' action='".setComments($conn)."'> <input type='hidden' name='studentID' value='".$studentID."'> <input type='hidden' name='date' value='".date('Y-m-d H:i:s')."'> <textarea class='cmtBox' name='message'></textarea> <br> <button class='btnCmtBox' type='submit' name='cmt-submit'>Comment</button> </textarea> </form> "; getComments($conn); ?>评论.php:<?php function setComments($conn) { if(isset($_POST['cmt-submit'])){ $message = $_POST['message']; $date = $_POST['date']; $studentID = $_POST['studentID']; $sql = "INSERT INTO `comment` (`message`, `date`, `studentID`) VALUES ('$message', '$date', '$studentID') "; $result = $conn->query($sql); // $stmt = $conn->prepare ("INSERT INTO `comment` (`message`, `date`, `studentID`) VALUES (?, ?, ?) "); // $stmt->bind_param("iii", $comment, $date, $username); // $stmt->execute(); // $result = $stmt->get_result(); } } function getComments($conn) { $sql = "SELECT `comment`.`message`, `comment`.`date`, `student`.`studentID`, `student`.`username` FROM `comment` INNER JOIN `student` ON `comment`.`studentID` = `student`.`studentID`"; $result = $conn->query($sql); while ($row = $result->fetch_assoc()) { echo "<div class='cmt-box'><p>"; echo $row['studentID']."<br>"; echo $row['username']."<br>"; echo $row['date']."<br>"; echo nl2br($row['message']); echo "</p>
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TA贡献1806条经验 获得超8个赞
您在 comments.php 的下面一行中给出了 input name
=text
而不是message
<input type='hidden' name='text' value='".$row['message']."'>
正确的代码是
<input type='hidden' name='message' value='".$row['message']."'>
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