注意：未定义变量：第 16 行 /Applications/XAMPP/xamppfiles

Question

使用用户名登录应用程序时，不使用电子邮件，因此会抛出以下错误，反之亦然“注意：未定义索引：电子邮件在 /Applications/XAMPP/xamppfiles/htdocs/menthor/login.php 中的第 16 行”我试过将产生错误的行放在条件中，但这些努力证明是徒劳的 Login.php 文件（与错误相关的部分）// STEP 1. Receive data / info paassed to current fileif ((empty($_REQUEST['username']) || empty($_REQUEST['password'])) && (empty($_REQUEST['email']) || empty($_REQUEST['password']))) {    $return['status'] = '400';    $return['message'] = 'Missing requird information';    echo json_encode($return);    return;} // securing received info / data from hackers or injections$email = htmlentities($_REQUEST['email']);$username = htmlentities($_REQUEST['username']);$password = htmlentities($_REQUEST['password']);// STEP 2. Establish connection with the serverrequire('secure/access.php');$access = new access('localhost' , 'root', '' , 'menthor');$access->connect();// STEP 3. Check existence of the user. Try to fetch the user with the same email address// STEP 3. Check availability of the login/user information$username_aval = $access->selectUser_Username($username);$email_aval = $access->selectUser_Email($email);//$return = array();// user is foundif ($username_aval) {    // Get encrypted password and salt from the server for validation    $encryptedPassword = $username_aval['password'];    $salt = $username_aval['salt'];通过 Web 服务器登录时的当前结果Notice: Undefined index: email in /Applications/XAMPP/xamppfiles/htdocs/menthor/login.php on line 16{"status":"200","message":"Successfully Logged In","id":"44","username":"rondell","email":"[e-mail]","fullName":"rondell","lastName":"","birthday":"","gender":"","cover":"","ava":"","bio":"","allow_follow":"1"}预期成绩{"status":"200","message":"Successfully Logged In","id":"44","username":"rondell","email":"[e-mail]","fullName":"rondell","lastName":"","birthday":"","gender":"","cover":"","ava":"","bio":"","allow_follow":"1"}

Answer 1

事实证明，经过一番思考，解决方案非常简单......我只需要简单地创建两个 login.php 文件......一个专门用于使用用户名和密码登录的用户，另一个用于用户签名输入电子邮件和密码...干杯

Answer 2

使用电子邮件作为对象，或者您可以转储请求并查看发生了什么