每次刷新页面时，PHP 电子邮件表单都会发送电子邮件

Question

每次刷新页面时，我的 php 电子邮件都会发送电子邮件。例如，用户正在填写表单并使用发送按钮发送。这一切都很好，但是如果他们刷新页面，它会再次发送包含所有相同表单信息的电子邮件。

我相信这是问题代码，但不知道是什么。

    require_once('class.phpmailer.php');
    if(isset($_POST['submit'])){
    $name = $_POST['name'];
    $subject = 'WebForm';
    $email = $_POST['email'];
    $body = $_POST['message'];
    $mail = new PHPMailer;
    // $mail->SMTPDebug = 2;
    // print_r($_POST);
    $mail->IsSMTP();
    $mail->SMTPAuth = true;
    $mail->SMTPSecure = "tls";
    $mail->Host = "smtp.office365.com";
    $mail->Port = 587;
    $mail->Username = "person@emailaddy.com";
    $mail->Password = "password";

    $mailto = "person@emailaddy.com";
    $mailfrom = "person@emailaddy.com";
    $mail->SetFrom($mailto, '');
    // $mail->AddReplyTo($mailfrom, 'email');
    $address = 'person@emailaddy.com';
    $mail->AddAddress($address, "My Addy");

    $mail->Subject  = $subject;
    $mail->AltBody  = $body;
    $mail->MsgHTML($body);

    if(!$mail->Send()) {
    echo 'Message has been sent';
    }
   }

Answer 1

试试这个-

require_once('class.phpmailer.php');
if(isset($_POST['submit'])){
    $name = $_POST['name'];
    $subject = 'WebForm';
    $email = $_POST['email'];
    $body = $_POST['message'];
    $mail = new PHPMailer;
    // $mail->SMTPDebug = 2;
    // print_r($_POST);
    $mail->IsSMTP();
    $mail->SMTPAuth = true;
    $mail->SMTPSecure = "tls";
    $mail->Host = "smtp.office365.com";
    $mail->Port = 587;
    $mail->Username = "person@emailaddy.com";
    $mail->Password = "password";

    $mailto = "person@emailaddy.com";
    $mailfrom = "person@emailaddy.com";
    $mail->SetFrom($mailto, '');
    // $mail->AddReplyTo($mailfrom, 'email');
    $address = 'person@emailaddy.com';
    $mail->AddAddress($address, "My Addy");

    $mail->Subject  = $subject;
    $mail->AltBody  = $body;
    $mail->MsgHTML($body);
    if(!$mail->Send()) {
        echo 'Message has been sent';
    }
}

mail 发送函数在 $_POST 检查的 if 条件之外。所以每次刷新都会发送邮件。

Answer 2

您应该在不同的 URL 上使用不同的文件来处理操作：

• 发送电子邮件
• 显示确认页面

例如：

在您的表单中

<form ... method="post" action="/sendmail.php">

在 sendmail.php 中

// same code as above except:
if(!$mail->Send()) {
    header("Location: success.php");
} else {
    header("Location: error.php");
}

See the doc for details.

在success.php中

<p>Oh yeah ;)</p>

在error.php中

<p>Ooops :(</p>

Answer 3

改用标题并确保标题之前没有输出。

if(!$mail->Send()) {
    header("Location: http://www.example.com");
    exit;
    }

如果这对您不起作用，请使用元刷新方法：

if(!$mail->Send()) {
$to = "http://www.example.com";
    $url = $to;
    print "<meta HTTP-EQUIV=Refresh CONTENT=\"0; URL=$url\">";
    exit;
}

或在 5 秒后显示一条消息并重定向：

if(!$mail->Send()) {
$to = "http://www.example.com";
    $url = $to;
    print "<meta HTTP-EQUIV=Refresh CONTENT=\"5; URL=$url\">";
    print "Thank you for your message.";
    exit;
}

---

编辑：（cookie/令牌方法）

您可以使用 cookie，这只是一个示例。

<?php

$token = time();
setcookie('formToken', $token, time() + 3600);

if(isset($_POST['submit'])){

if($_POST['token'] != $_COOKIE['formToken']){
// die("Sorry");

$error_list .= '<li>You can not submit this form twice.</li>';

echo $error_list;

echo '
Thank you, your message has been sent. You do not need resubmit it again.
';

exit;

}

    foreach( $_POST as $values ) { $data .= $values . "<br>"; echo $data; }

}

?>

<form action="" method="POST">  

Name: <input type="text" name="name">
<br>
Email: <input type="text" name="email">
<input type="hidden" name="token" value="<?php echo $token; ?>" />

<input type="submit" value="Submit" name="submit" />
</form>