Question

我正在尝试通过PHP验证电子邮件。我是PHP的新手，所以如果它非常简单，我会事先道歉。

我的页面加载没有错误，但我可以继续使用错误的格式化电子邮件提交表单。我希望页面刷新并弹出一条消息，提示用户使用有效的电子邮件地址。

提前致谢

<?php
    session_start();

    require 'database.php';

    $message = '';

    if (isset($_POST['email']) == true && empty($_POST['email']) == false) {
        $email = $_POST['email'];

        if(filter_var($email, FILTER_VALIDATE_EMAIL) == true){
            echo 'That\'s a valid email address';
        } else {
            echo'Not a valid email address';
        }
    }
    if(!empty($_POST['email']) && !empty($_POST['phonenumber']) && !empty($_POST['postcode']) && !empty($_POST['Name'])):

        $stmt = $conn->prepare('SELECT email FROM noodles_gamification WHERE email = :email');
        $stmt->execute(array(':email' => $_POST['email']));
        $row = $stmt->fetch(PDO::FETCH_ASSOC);

        if(!empty($row['email'])){
            $message = 'email provided is already in use.';
        } else {

            $sql = "INSERT INTO noodles_gamification (email, phonenumber, postcode, Name) VALUES (:email, :phonenumber, :postcode, :Name)";
            $stmt = $conn->prepare($sql);

            $stmt->bindParam(':email', $_POST['email']);

            $stmt->bindParam(':phonenumber', $_POST['phonenumber']);
            $stmt->bindParam(':postcode', $_POST['postcode']);
            $stmt->bindParam(':Name', $_POST['Name']);

            if( $stmt->execute() ){
                $_SESSION['email'] =  $_POST['email'];
                header("Location: ../");
            }
        }
    endif;
?>

<!DOCTYPE html>
<html>
<head>
<title>Register</title>
<link rel="stylesheet" stype="text/css" href="style.css">
<link href="https://fonts.googleapis.com/css?family=Comfortaa" rel="stylesheet">

</head>

<body>
<div class="header">
  <a href="../index.php"> Your App Name</a>
</div>

<?php if(!empty($message)): ?>
    <p><?= $message ?></p>
<?php endif; ?>

<h1>Need a few details before you start the game</h1>
    <form action="register.php" method="POST">
    <input type="text" placeholder="Enter Your Full Name" name="Name">
        <input type="text" placeholder="Enter Your Email" name="email">
        <input type="text" placeholder="Phone Number" name="phonenumber">
        <input type="text" placeholder="Post Code" name="postcode">

    <input type="submit">
</body>
</html>

Answer 1

您正在编写验证电子邮件的代码

if (isset($_POST['email']) == true && empty($_POST['email']) == false) {
        $email = $_POST['email'];
        if(filter_var($email, FILTER_VALIDATE_EMAIL) == true){
            echo 'That\'s a valid email address';

        } else {
            echo'Not a valid email address';

        }
    }

但在验证之后，您正在显示消息，并且您的脚本会进一步执行。而在显示电子邮件错误后您应该停止。所以使用这个

$emailError=false;
if (isset($_POST['email']) == true && empty($_POST['email']) == false) {
        $email = $_POST['email'];
        if(filter_var($email, FILTER_VALIDATE_EMAIL) == true){
            echo 'That\'s a valid email address';

        } else {
            echo'Not a valid email address';
            $emailError=true;

        }
    }

然后检查emailError是否为false然后再进一步

if(!$emailError){
   //your code to save the data or manipulate the data
}

Answer 2

在PHP中验证电子邮件的简单方法如下，

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { // invalid emailaddress }

您可以参考链接How to validate an Email in PHP

谢谢。

验证电子邮件故障 - PHP

2 个答案: