我在现场有一个联系表，它曾经可以工作，但从最近几个月开始就停止了正常工作。这可能是由于一些我无法弄清楚的编码错误。发生的情况是我收到了发送的消息，但它们完全是空白的，根本没有内容。可能是什么问题？
我先附上前端页面，然后附上后端。
前端代码的contact.php示例：-
<div id="content">
<h2 class="newitemsxl">Contact Us</h2>
<div id="contactcontent">
<form method="post" action="contactus.php">
Name:<br />
<input type="text" name="Name" /><br />
Email:<br />
<input type="text" name="replyemail" /><br />
Your message:<br />
<textarea name="comments" cols="40" rows="4"></textarea><br /><br />
<?php require("ClassMathGuard.php"); MathGuard::insertQuestion(); ?><br />
<input type="submit" name="submit" value="Send" />
* Refresh browser for a different question. :-)
</form>
</div>
</div>
contactus.php 示例（后端代码）：-
<?php
/* first we need to require our MathGuard class */
require ("ClassMathGuard.php");
/* this condition checks the user input. Don't change the condition, just the body within the curly braces */
if (MathGuard :: checkResult($_REQUEST['mathguard_answer'], $_REQUEST['mathguard_code'])) {
$mailto="questions@stylishgoods.com";
$pcount=0;
$gcount=0;
$subject = "A Stylish Goods Enquiry";
$from="DO_NOT_reply@stylishgoods.com";
echo ("Great, you're message has been sent !"); //insert your code that will be executed when user enters the correct answer
} else {
echo ("Sorry, wrong answer, please go back and try again !"); //insert your code which tells the user he is spamming your website
}
while (list($key,$val)=each($HTTP_POST_VARS))
{
$pstr = $pstr."$key : $val \n ";
++$pcount;
}
while (list($key,$val)=each($HTTP_GET_VARS))
{
$gstr = $gstr."$key : $val \n ";
++$gcount;
}
if ($pcount > $gcount)
{
$comments=$pstr;
mail($mailto,$subject,$comments,"From:".$from);
}
else
{
$comments=$gstr;
mail($mailto,$subject,$comments,"From:".$from);
}
?>