php/username：页面仍显示已删除的数据

我正在尝试创建这些页面。第一个页面获取用户的信息，然后将其保存在phpadmin上，然后将u带到选择的进入和退出日期页面。但是，用户输入进入和退出时间，然后保存属性表、否、进入日期、退出日期和用户名。但问题是，用户名并没有保持不变。就像我昨天创建这些页面时，一切正常，但现在出现了一个问题，我删除了一些客户名称并重新输入了新名称，但当我尝试使用php时，它会一直显示旧用户名。举个例子,， 在这张图中，在我点击注册表输入数据后，已经删除的人的用户名和密码开始出现：

在这幅图中，在我输入了一个与以前不同的用户名之后，它仍然从我以前删除的数据库中获取用户名，并将其放入我的phpadmin中。例如，我将用户名xand1放在屏幕顶部，用户名取值andy91，它来自我的旧数据库：

这是我的注册代码：

<?php
        $firstnameError = $lastnameError = $usernameError = $passwordError = $birthdateError = $mobileError = $emailError = "";
    // Check if data are posted.
    if (isset($_POST['submit'])){
        $firstname = $lastname = $username = $password = $birthdate = $mobile = $email = "";
        $errorOccured = false;

        if (isset($_POST['tsmFirstName'])){
            $firstname = trim($_POST['tsmFirstName']);
            if (strlen($firstname) == 0){
                $firstnameError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $firstnameError = "First Name is missing";
        }

        //Checking last name
        if (isset($_POST['tsmLastName'])){
            $lastname = trim($_POST['tsmLastName']);
            if (strlen($lastname) == 0){
                $lastnameError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $lastnameError = "First Name is missing";
        }

        //checking the username
        if (isset($_POST['tsmUserName'])){
            $username = trim($_POST['tsmUserName']);
            $usernameLenght = strlen($username);
            if ($usernameLenght == 0){
                $usernameError = "First Name is missing";
                $errorOccured = true;
            }
            elseif ($usernameLenght < 4){
                $usernameError = "Your username should be minimum 4 characters";
                $errorOccured = true;
            }
        }
        else{
            $usernameError = "First Name is missing";
        }


        //checking the password
        if (isset($_POST['tsmPassword'])){
            $password = trim($_POST['tsmPassword']);
            if (strlen($password) == 0){
                $passwordError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $passwordError = "First Name is missing";
        }

        //checking the birthdate
        if (isset($_POST['tsmBirthDate'])){
            $birthdate = trim($_POST['tsmBirthDate']);
            if (strlen($birthdate) == 0){
                $birthdateError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $birthdateError = "First Name is missing";
        }

        // checking the mobile
        if (isset($_POST['tsmMobile'])){
            $mobile = trim($_POST['tsmMobile']);
            if (strlen($mobile) == 0){
                $mobileError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $mobileError = "Mobile is missing";
        }

        //checking the email
        if (isset($_POST['tsmEmail'])){
            $email = trim($_POST['tsmEmail']);
            if (strlen($email) == 0){
                $emailError = "Email is missing";
                $errorOccured = true;
            }
        }
        else{
            $emailError = "Email is missing";
        }                                                       


        if(!$errorOccured){
            require_once("connection.php");

        $_SESSION['tsmUserName']=$username;
        var_dump($_SESSION);
            $keychain= sha1($username);
            $my_query="INSERT INTO users (id, firstname, lastname, username, password, birthdate, mobile, email, status, keychain) VALUES (NULL,'$firstname','$lastname','$username','$password','2016-1-1','$mobile','$email','0','$keychain')";
            $result=mysqli_query($connection,$my_query);
            if($result){
                $message_mail = "Dear $firstname, <br> Thank You for registering with us. Click now on the link below to activate your account. <br> $keychain <br><br> Thank You.";
                $subject_mail= "Your account has been created";
                $to_mail = $email;
                $headers[]= 'MIME-Version 1.0';
                $headers[]= 'content-type:text/html; charset=utf8';
                $headers[]= 'From: admin@tassimo.com';
                mail($to_mail,$subject_mail,$message_mail,implode("\r\n",$headers));
                //after email is sent redirect to thank you page.
                header("Location:completed.php?task=done");
                exit();
                echo 'Thank You';
            }
                else{
                    echo "<b> Error unable to post. </b>";
                    mysqli_error($connection);
                }
                mysqli_close($connection);
            }

        }


?>

---

您所有的第一个错误都有相同的描述“缺少名字”。我认为你应该改变这种情况。如果您上传的第二个代码设置为$_SESSION['tsmUserName']，那就好了

关于第一个屏幕，您可以删除浏览器数据以删除自动填充选项。
并且您有所有这些的代码？好的，如果您只是想发布漂亮的图片，那么我们无法帮助您。祝你好运，哦。。。开始接受一些给你的答案。@Fred ii-对不起，我忘记输入密码了，等等。。你接受答案是什么意思？@Fred ii-我把我的代码invar_dump（$_POST）放在了complete中。phpyea会改变名字的东西。。问题是，对于第二页，我不希望用户再次输入用户名，我也不知道如何使用isset，除非你想获得输入值或其他信息：/i在我尝试将用户名作为主键之前，我的代码工作正常。。我确实将其从主要位置删除，但错误仍然存在
<?php
session_start();
$EntryError=$ExitError="";
    if (isset($_POST['submit'])){
        $entrydate = $exitdate = "";
        $errorOccured = false;

        if (isset($_POST['tsmdate'])){
            $entrydate = trim($_POST['tsmdate']);
            if (strlen($entrydate) == 0){
                $EntryError = "date is missing";
                $errorOccured = true;
            }
        }
        else{
            $EntryError = "date is missing";
        }

        // checking for last name
        if (isset($_POST['tsmexit'])){
            $exitdate = trim($_POST['tsmexit']);
            if (strlen($exitdate) == 0){
                $ExitError = "First Name is missing";
                $errorOccured = true;
            }
        }
        else{
            $ExitError = "last Name is missing";
        }
        $ids=$_SESSION['tsmUserName'];
        var_dump($_SESSION);
        if(!$errorOccured){
            require_once("connection.php");
            $my_query="INSERT INTO timing (`No`, `Entry Date and Time`, `Exit Date and Time`, `Username`) VALUES (NULL,'$EntryError','$exitdate','$ids')";
            $result=mysqli_query($connection,$my_query);
            if($result)
            {
                echo 'thank you';
            }
            else
            {
                echo 'error';
            }
            mysqli_close($connection);
        }
    }   
?>