HTML表單工作，但需要php驗證

Question

我需要幫助。我需要做什麼來驗證此表單中的電子郵件？這是一個登錄頁面，我想在訪問我的內容here is this demo之前獲取訪問者的電子郵件。

我可以得到一些提示或正確的代碼用於此頁面嗎？

<form id="contact-form" action="send.php"> 
<input type="text" name="email" placeholder="you@yourmail.com" class="cform-text" size="40" title="your email" required> 
<input type="submit" value="Enter Now" class="cform-submit"> 
</form> 

send.php文件：

$visitorEmail = $_GET['email']; 
$email_from = "doctordongok@gmail.com"; 
$email_subject = "New Form Submission! - From: " + $visitorEmail; 
// edit here 
$email_body = "New visitor - $visitorEmail";  
$to = "doctordongok@gmail.com"; 
$headers = "From: $email_from \r \n"; 
$headers .= "Reply-To: $visitorEmail \r \n";  
mail($to, $email_subject, $email_body, $headers); 
header("Location: http://www.de-signs.com.au"); 

謝謝！

Answer 1

最好的辦法可能是在客戶端使用Javascript進行驗證，並在服務器端使用正則表達式進行驗證。

Validating an email with Javascript

Answer 2

使用PHP的filter_var()功能：

if(filter_var($visitorEmail, FILTER_VALIDATE_EMAIL) === false) { 
    // Invalid E-Mail address 
} else { 
    // OK 
} 

所以到實體模型使用新的腳本。它會是這個樣子

$visitorEmail = $_GET['email']; 

if(filter_var($visitorEmail, FILTER_VALIDATE_EMAIL) === false) { 
    die('Sorry that\'s no valid e-mail address'); 
} else { 
    $email_from = 'doctordongok@gmail.com'; 
    $email_subject = 'New Form Submission! - From: ' . $visitorEmail; 

    // edit here 
    $email_body = 'New visitor - ' . $visitorEmail;  
    $to = 'doctordongok@gmail.com'; 
    $headers = 'From: $email_from' . PHP_EOL; 
    $headers .= 'Reply-To: $visitorEmail' . PHP_EOL;  
    mail($to, $email_subject, $email_body, $headers); 

    header('Location: http://www.de-signs.com.au'); 
    exit; 
} 

Answer 3

HTML5的新email類型輸入爲您提供幫助。

<input type="email" name="email" placeholder="you@yourmail.com" class="cform-text" size="40" title="your email" required />