这已经持续了一段时间，我似乎无法理解为什么。我已经构建了一个使用PHPMailer发送的表单，无论出于何种原因，我们不断从表单中获取带有所有空白字段值的电子邮件。这是在不同网站上的多种形式上发生的，都具有相同的设置。所以它不仅限于这种特定的形式。
将空白表单发送出去，表单在测试时可以正常工作。如果我填写并发送测试，一切都会好起来的。我不确定这些空提交是如何发生的。该表单使用javascript在大多数字段上进行验证。
这是我的HTML代码：
<div class="thank-you-message"></div>
<form id="contactForm" class="form-horizontal" action="" method="post">
<!-- col 1 -->
<div class="form-l">
<div class="control-group">
<div class="controls">
<input type="text" name="first-name" id="first-name" class="validate[required,custom[onlyLetterSp],length[0,100]]" placeholder="first name" />
</div>
</div><!-- /.control-group -->
<div class="control-group">
<div class="controls">
<input type="text" name="last-name" id="last-name" class="validate[required,custom[onlyLetterSp],length[0,100]]" placeholder="last name" />
</div>
</div><!-- /.control-group -->
<div class="control-group">
<div class="controls">
<input type="text" name="email" id="email" class="validate[required,custom[email]]" placeholder="email address" />
</div>
</div><!-- /.control-group -->
<div class="control-group">
<div class="controls">
<input class="last" type="text" name="phone" id="phone" class="validate[required,custom[phone]]" placeholder="phone number" />
</div>
</div><!-- /.control-group -->
</div>
<!--../ col 1 -->
<!-- col 2 -->
<div class="form-r">
<div class="control-group">
<div class="controls">
<textarea rows="5" name="comments" id="comments" placeholder="message"></textarea>
</div>
</div><!-- /.control-group -->
<div class="control-group">
<div class="controls">
<button type="submit" class="submit"><span>send</span></button>
</div>
</div><!-- /.control-group -->
</div>
<!--../ col 1 -->
</form>
这是phpMailer代码
<?php
// REQUIRE PHPMAILER CLASS
// -----------------------------------------------------------------------------
require_once("PHPMailerAutoload.php");
$mail = new PHPMailer();
// SET POST VARIABLES
// -----------------------------------------------------------------------------
$visitorEmail=filter_var($_POST['email']);
$name=filter_var($_POST['first-name'].' '.$_POST['last-name']);
$phone=filter_var($_POST['phone']);
$comments=filter_var($_POST['comments']);
// TO ADMIN EMAIL
// -----------------------------------------------------------------------------
// Mail Headers
$mail->IsHTML(true); // Send as HTML
$mail->AddReplyTo($visitorEmail, $name);
$mail->From = 'the@adminemail.com';
$mail->FromName = 'The Admin <the@adminemail.com>';
$mail->AddAddress("the@adminemail.com");
// Mail Subject
$mail->Subject = "The Web Form";
// Mail Body
$mail->Body = '<html><body>
<img src="http://url.to/image.jpg" alt="Thank you for contacting us!" />
<p>Someone has submitted your form.</p>
<table rules="all" style="border-color: #666;" cellpadding="10">
<tr style="background: #eee;"><td><strong>Sent From:</strong> </td><td>The Web Form</td></tr>
<tr><td><strong>Name:</strong> </td><td>' .$name. '</td></tr>
<tr><td><strong>Email:</strong> </td><td>' .$visitorEmail. '</td></tr>
<tr><td><strong>Phone:</strong> </td><td>' .$phone. '</td></tr>
<tr><td><strong>Comments:</strong> </td><td>' .$comments. '</td></tr>
</table>
</body></html>';
$mail->Send(); // Send mail to admin
$mail->ClearAddresses(); // Clear all addresses and attachments for next loop
// TO VISITOR EMAIL
// -----------------------------------------------------------------------------
// Mail Headers
$mail->IsHTML(true); // Send as HTML
$mail->From = 'the@adminemail.com';
$mail->FromName = "The Admin <the@adminemail.com>";
$mail->AddAddress($visitorEmail);
// Mail Subject
$mail->Subject = "Thank you for contacting us";
// Mail Body
$mail->Body = '<html><body>
<img src="http://url.to/image.jpg" alt="Thank you for contacting us!" />
<p>Hello,</p>
<p>Thanks for contacting us. We have received your message and will get in touch with you shortly.</p>
<p>A copy of the information you provided us with has been posted below:</p>
<table rules="all" style="border-color: #666;" cellpadding="10">
<tr style="background: #eee;"><td><strong>Name:</strong> </td><td>' .$name. '</td></tr>
<tr><td><strong>Email:</strong> </td><td>' .$visitorEmail. '</td></tr>
<tr><td><strong>Phone:</strong> </td><td>' .$phone. '</td></tr>
<tr><td><strong>Comments:</strong> </td><td>' .$comments. '</td></tr>
</table>
</body></html>';
// THANK YOU MESSAGE
// -----------------------------------------------------------------------------
if($visitorEmail == '') {
// If email field is blank, and validation doesn't work
echo '<h2>Error</h2><p>An error has occurred. Please reload the page and try again. Thanks!</p>';
} else {
if(!$mail->Send()) {
// If mail fails to send
echo '<h2><strong>Message was not sent.</strong></h2>';
echo '<p>Mailer error: ' . $mail->ErrorInfo . '</p>';
} else {
// Success
echo '<h2>thanks for contacting us</h2> <p>We will get back to you as soon as possible.</p>
<p>If you have any immediate questions please give us a call. </p>';
}
}
?>
答案 0 :(得分：4)
正如评论中所述，很可能是垃圾邮件机器人，以及访问您网站但根本没有输入任何内容的人。这已知会发生。
我可以告诉你，你只是在检查if($visitorEmail == '')是否等于什么。
最好对表单字段使用条件语句，以及使用PHP
即：使用|| - OR运算符（如果其中一个为空）
if(!empty($_POST['form_field']) || !empty($_POST['other_form_field']))
{
// we are good to go, fire up your PHP/mailing code
}
else {
// do something else
}
或（使用&& - AND运算符） - （如果一个不为空且已设置）
if(!empty($_POST['form_field']) && isset($_POST['form_field']))
{
// we are good to go, fire up your PHP/mailing code
}
else {
// do something else
}