Question

我在php中注册表单。我不知道如何验证我输入的电子邮件和（密码和确认密码）在PHP中。对于电子邮件，如果我输入相同的ID＆＃34;它应该告诉我的电子邮件已经注册＆＃34;并且对于密码和确认密码应检查是否相同。我在编码中尝试过电子邮件。它抛出错误电子邮件已经注册但我想在登录屏幕中显示错误。请帮助这两件事。我是非常新的PHP。抱歉我的英语不好。我已在下面返回我的代码，

<?php
require('config.php');
// If the values are posted, insert them into the database.
if (isset($_POST['username']) && isset($_POST['password'])){
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    $cpassword = $_POST['confirmpassword'];
    $slquery = "SELECT 1 FROM register WHERE email = '$email'";
    $selectresult = mysql_query($slquery);
    if(mysql_num_rows($selectresult)>0)
    {
        die('email already exists');
    }

    $query = "INSERT INTO `register` (username, password,confirmpassword, email) VALUES ('$username', '$password', '$cpassword', '$email')";
    $result = mysql_query($query);
    if($result){
        $msg = "User Created Successfully.";
    }
   }
?>
<!DOCTYPE html>
<html>
<head>
    <title>Login screen</title>
    <style type="text/css">
    .register-form{
        width: 500px;
        margin: 0 auto;
        text-align: center;
        padding: 10px;
        padding: 10px;
        background : #c4c4c4;
        border-radius: 10px;
        -webkit-border-radius:10px;
        -moz-border-radius:10px;
    }
    .register-form form input{padding: 5px;}
    .register-form .btn{
        background: #726E6E;
        padding: 7px;
        border-radius: 5px;
        text-decoration: none;
        width: 50px;
        display: inline-block;
        color: #FFF;
    }
    .register-form .register{
        border: 0;
        width: 60px;
        padding: 8px;
    }
    </style>
</head>
<body>
    <div class="register-form">
    <?php
        if(isset($msg) & !empty($msg)){
        echo $msg;
    }
    ?>
    <?php
    if(isset($errormes))
    {
        echo $errormes;
    }
    ?>
        <h1>Register</h1>
        <form action="" method="POST">
            <p><label>User Name: </label>
            <input type="text" id="username" name="username" placeholder="Username">
            </p>
            <p><label>E-Mail&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; :</label>
            <input id="email" name="email" type="email">
            </p>
            <p><label>Password&nbsp;&nbsp; :</label>
            <input id="password" name="password" type="password">
            </p>
            <p><label>confirm Password &nbsp;&nbsp; :</label>
            <input id="confirmpassword" name="confirmpassword" type="password">
            </p>
            <input type="submit" name="submit" value="register" class="btn register">
            <a class="btn" href="login.php">Login</a>
        </form>
    </div>
</body>
</html>

Answer 1

die（）函数将有效地停止脚本的执行。这意味着没有更多的代码将在该行之后运行。

您可能希望使用某些内容作为标题（）将用户重定向到显示不正确的登录屏幕的页面。

或者您可以包含该页面，就像您在示例中所做的那样。像这样：

<?php
require('config.php');
// If the values are posted, insert them into the database.
if (isset($_POST['username']) && isset($_POST['password'])){
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    $cpassword = $_POST['confirmpassword'];
    $slquery = "SELECT 1 FROM register WHERE email = '$email'";
    $selectresult = mysql_query($slquery);
    if(mysql_num_rows($selectresult)>0)
    {
         $msg = 'email already exists';
    }
    elseif($password != $cpassword){
         $msg = "passwords doesn't match";
    }
    else{
          $query = "INSERT INTO `register` (username, password,confirmpassword, email) VALUES ('$username', '$password', '$cpassword', '$email')";
          $result = mysql_query($query);
          if($result){
             $msg = "User Created Successfully.";
          }
    }
   }
?>

用这个替换你的第一个代码块。

Answer 2

首先，欢迎使用PHP！

让我告诉你一件事，以与执行源代码相同的方式编写源代码并不是一个好习惯。使用具有许多优点的功能。由于您是PHP的新手，并且您只是运行一个简单的要求，因此我有最适合您的解决方案。

现在请注意：

我使用了三个用户定义的函数。
将$msg和$errormes替换为echo（它将打印出来 HTML内容之上的消息）。最好还是单独保存PHP和HTML（除非你真的需要它们，否则不要混在一起）。

这是完整的代码。试试这个：

<?php

require_once('config.php');

// function for email validation
function is_valid_email($mail)
{
     if (empty($mail)) {
         echo "Email is required.";
         return false;
     } else {
         $email = test_input($mail);
         // check if e-mail address is well-formed
         if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
           echo "Invalid email format."; 
           return false;
     } 
     // now check if the mail is already registered
     $slquery = "SELECT 1 FROM register WHERE email = '$email'";
     $selectresult = mysql_query($slquery);
     if(mysql_num_rows($selectresult)>0) {
       echo 'This email already exists.';
       return false;
     }
     // now returns the true- means you can proceed with this mail
     return true;
}

// function for password verification
function is_valid_passwords($pass,$confirmpass) 
{
     // Your validation code.
     if (empty($pass)) {
         echo "Password is required.";
         return false;
     } 
     else if ($pass != $confirmpass) {
         // error matching passwords
         echo 'Your passwords do not match. Please type carefully.';
         return false;
     }
     // passwords match
     return true;
}

// function for creating user
function create_user($username, $password, $cpassword, $email) 
{
      $query = "INSERT INTO `register` (username, password, confirmpassword, email) VALUES ('$username', '$password', '$cpassword', '$email')";
      $result = mysql_query($query);
      if($result){
          return true; // Success
      }else{
          return false; // Error somewhere
      }
}

// Code execution starts here when submit
if (isset($_POST['username']) && isset($_POST['password'])){

    // Reading form values
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = $_POST['password'];
    $cpassword = $_POST['confirmpassword'];

    if (is_valid_email($email) && is_valid_passwords($password,$cpassword))
    {
        if (create_user($username, $password, $cpassword, $email)) {
              echo 'New User Registered Successfully.';
        }else{
          echo 'Error Registering User!';
        }
    }
    // You don't need to write another 'else' since this is the end of PHP code 
?>

<!-- Here you go with the HTML -->

<!DOCTYPE html>
    <html>
    <head>
        <title>Login screen</title>
        <style type="text/css">
        .register-form{
            width: 500px;
            margin: 0 auto;
            text-align: center;
            padding: 10px;
            padding: 10px;
            background : #c4c4c4;
            border-radius: 10px;
            -webkit-border-radius:10px;
            -moz-border-radius:10px;
        }
        .register-form form input{padding: 5px;}
        .register-form .btn{
            background: #726E6E;
            padding: 7px;
            border-radius: 5px;
            text-decoration: none;
            width: 50px;
            display: inline-block;
            color: #FFF;
        }
        .register-form .register{
            border: 0;
            width: 60px;
            padding: 8px;
        }
        </style>
    </head>
    <body>
        <div class="register-form">
            <h1>Register</h1>
            <form action="" method="POST">
                <p><label>User Name: </label>
                <input type="text" id="username" name="username" placeholder="Username">
                </p>
                <p><label>E-Mail&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; :</label>
                <input id="email" name="email" type="email">
                </p>
                <p><label>Password&nbsp;&nbsp; :</label>
                <input id="password" name="password" type="password">
                </p>
                <p><label>confirm Password &nbsp;&nbsp; :</label>
                <input id="confirmpassword" name="confirmpassword" type="password">
                </p>
                <input type="submit" name="submit" value="register" class="btn register">
                <a class="btn" href="login.php">Login</a>
            </form>
        </div>
    </body>
    </html>

现在以.php文件格式保存此代码并运行。你会看到你想要的方式。

在PHP中尝试实验。只是谷歌更多。只问 - 如果你被困了很长时间。

谢谢。

如何验证电子邮件ID和密码＆amp;在php中确认密码

2 个答案: