自定义错误消息页面

Question

我真的很陌生。我在网上获得了这个代码的消息表。

html

<form name="htmlform" method="post" action="html_form_send.php">
<table width="50%px" align="center">
<tr>
 <td valign="top" align="center">
  <input  type="text" name="first_name" maxlength="50" size="30">
 </td>
</tr>
<tr>
 <td align="center" valign="top">
  <label for="first_name"><h5>*First Name</h5></label>
 </td>
 </tr>


 <tr>
 <td valign="top" align="center">
  <input  type="text" name="last_name" maxlength="50" size="30">
 </td>
</tr>
<tr>
 <td valign="top" align="center">
  <label for="last_name"><h5>*Last Name</h5></label>
 </td>
 </tr>


 <tr>
 <td valign="top" align="center">
  <input  type="text" name="email" maxlength="80" size="30">
 </td>
 <tr>
 <td valign="top" align="center">
  <label for="email"><h5>*Email Address</h5></label>
 </td>
 </tr>


 <tr>
 <td valign="top" align="center">
  <input  type="text" name="telephone" maxlength="30" size="30">
 </td>
</tr>
</tr>
<tr>
 <td valign="top" align="center">
  <label for="telephone"><h5>Telephone Number</h5></label>
 </td>
 </tr>

 <tr>
 <td valign="top" align="center">
  <textarea  name="comments" maxlength="1000" cols="32" rows="4"></textarea>
 </td>
 <tr>
 <td valign="top" align="center">
  <label for="comments"><h5>*Message</h5></label>
 </td>
 </tr>

</tr>
<tr>
 <td height="106" colspan="2" valign="top" style="text-align:center">
  <input type="image" src="images/send.png" width="90px">
 </td>
</tr>
</table>
</form>

PHP

<?php
if(isset($_POST['email'])) {

    // CHANGE THE TWO LINES BELOW
    $email_to = "yourname@yourdomain.com";

    $email_subject = "Contact Form";


    function died($error) {
        // your error code can go here
        echo "We are very sorry, but there were error(s) found with the form you submitted. ";
        echo "These errors appear below.<br /><br />";
        echo $error."<br /><br />";
        echo "Please go back and fix these errors.<br /><br />";
        die();
    }

    // validation expected data exists
    if(!isset($_POST['first_name']) ||
        !isset($_POST['last_name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['telephone']) ||
        !isset($_POST['comments'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');       
    }

    $first_name = $_POST['first_name']; // required
    $last_name = $_POST['last_name']; // required
    $email_from = $_POST['email']; // required
    $telephone = $_POST['telephone']; // not required
    $comments = $_POST['comments']; // required

    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
  if(!preg_match($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
    $string_exp = "/^[A-Za-z .'-]+$/";
  if(!preg_match($string_exp,$first_name)) {
    $error_message .= 'The First Name you entered does not appear to be valid.<br />';
  }
  if(!preg_match($string_exp,$last_name)) {
    $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
  }
  if(strlen($comments) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if(strlen($error_message) > 0) {
    died($error_message);
  }
    $email_message = "Form details below.\n\n";

    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }

    $email_message .= "First Name: ".clean_string($first_name)."\n";
    $email_message .= "Last Name: ".clean_string($last_name)."\n";
    $email_message .= "Email: ".clean_string($email_from)."\n";
    $email_message .= "Telephone: ".clean_string($telephone)."\n";
    $email_message .= "Comments: ".clean_string($comments)."\n";


// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
@mail($email_to, $email_subject, $email_message, $headers);  
?>

<!-- place your own success html below -->




<?php
}
die();
?>

我拿出一些东西来节省空间，就像我的成功页面的HTML一样。

在我建立声誉之前，我无法加载图片。但是，我的成功页面与我的其他页面相同。有相同的页眉，页脚，背景等，但我的错误页面只是一个空白页面，只有测试。

如何使错误页面看起来就像只有不同文本的成功页面一样？