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connect_error) { die("连接失败: " . $conn->connect_error); } //查询数据 // 1 id varchar(255) utf8_general_ci // 2 username varchar(20) utf8_general_ci // 3 message varchar(255) utf8_general_ci // 4 time datetime //时间倒序查询 $sql = "SELECT * FROM message ORDER BY time DESC"; $result = $conn->query($sql); if ($result->num_rows > 0) { // 输出数据 while ($row = $result->fetch_assoc()) { echo "
"; echo "
"; echo "
" . $row["username"] . "
"; echo "
时间:" . $row["time"] . "
"; echo '
留言内容:' . $row["message"] . '
'; echo "
"; echo "
"; echo "
"; } } else { //没有数据 echo ""; } $conn->close(); ?>
connect_error) { die("连接失败: " . $conn->connect_error); } // 2.插入数据 // 判断是否POST提交 if ($_POST['name'] && $_POST['content']) { if ($_POST['name'] != null && $_POST['content'] != null) { $name = $_POST['name']; $content = $_POST['content']; //生成随机id 12位,md5加密内容和时间戳 $id = substr(md5($content . time()), 0, 20); $sql = "INSERT INTO message (id, username, message, time) VALUES ('$id', '$name', '$content', now())"; if ($conn->query($sql) === TRUE) { //sweet alert插入成功,点击确定后刷新页面 echo ' '; } else { echo "Error: " . $sql . "
" . $conn->error; } } else { //sweet alert插入失败,点击确定后刷新页面 echo ' '; } } ?>