Question

新数据未插入数据库

基本上是试图开发一个编辑用户页面，在该页面中用户可以编辑关于自己的少量信息。我是PHP的新手，所以不确定如何从HTML的输入框中更新新信息，然后将其注入数据库中以供合适的用户使用。我知道这段代码已经过时了，这就是我在大学里教的方式，这是我能及时上大学完成我的作业的唯一方法，而无需重新学习我对php的了解。我正在运行包含用户ID的会话，我想通过用户ID选择一个用户，然后更改该用户的信息。

我相信更新查询是我的问题，这是我到目前为止所拥有的：

<?php

if (isset($_POST['submit'])) {
include_once 'dbcon.php';
$uname = mysqli_real_escape_string($conn, $_POST['uname']); //mysqli prevents database reading code (converts to text)
$first = mysqli_real_escape_string($conn, $_POST['firstname']);
$last = mysqli_real_escape_string($conn, $_POST['lastname']);
$email = mysqli_real_escape_string($conn, $_POST['email']);
$uid = $_SESSION['u_id'];

//Error Handling
//Empty Field Check
if (empty($uname) || empty($first) || empty($last) || empty($email)) {
    header("Location: ../profile.php?update=empty"); //return them to register if fields are empty
    exit();
} else {
    //Input characters valid?
    if (!preg_match("/^[a-zA-Z]*$/", $first) || !preg_match("/^[a-zA-Z]*$/", $last)) {
      header("Location: ../profile.php?update=invalid");
      exit();
    } else {
      //Email validity checked
      if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        header("Location: ../profile.php?update=email");
        exit();
      } else {
          //Check if username is taken
          $sql = "SELECT * FROM user WHERE user_username='$uname'";
          $result = mysqli_query($conn, $sql);
          $resultCheck = mysqli_num_rows($result);

          if ($resultCheck > 0) {
            header("Location: ../profile.php?update=usernametaken");
            exit();
          } else {
              //UPDATE user in database
              $sql = "UPDATE user 
                      SET user_username = $uname, 
                          user_first = $first,
                          user_last = $last, 
                          user_email = $email  
                      WHERE user_id = '$uid'";
              mysqli_query($conn, $sql);
              //USER IS TAKEN HERE AFTER UPDATED INFORMATION
              header("Location: ../profile.php?update=success");
              exit();

          }
      }
    }
}

更改用户信息时出现UPDATE查询问题

0 个答案: