error message in two places

 $pageTitle = "Mohr Creations | Portfolio";
 $section = "Portfolio";
 include('header.php'); ?>  



    <div id="content">



        <div class="section shirts latest">

            <div class="wrapper">

                <h2>Mohr Creations artwork</h2>

                <?php include("products.php"); ?> 
                <ul class="products">
                    <?php 

                    $total_products = count($products);
                    $position = 0;
                    $list_veiw_html = "";
                    foreach($products as $product_id => $product) {
                        $position = $position + 1;
                        if ($total_products - $position < 4) {
                            $list_view_html = get_list_view_html($product_id,$product) . $list_view_html;
                      }
                    } 
                    echo $list_view_html;
                   ?>

                </ul>

            </div>

        </div>

    </div>



   <?php include('footer.php'); ?> ```



contact.php




``` <?php 

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   $name = trim($_POST["name"]);
   $email = trim($_POST["email"]);
   $message = trim($_POST["message"]);

   if ($name == "" OR $email == "" OR $message == "") {
    $error_message = "You must specify a value for name, email address, and message.";

   }

   if(!isset($error_message)) {
       foreach( $_POST as $value ) {
        if(stripos($value, 'content-type:') !== FALSE){
            $error_message = "There was a problem with the information you entered.";

          } 
        }
      }
   if (!isset($error_message) AND $_POST["address"] != "") {
     $error_message = "Your form submission has an error.";

   }

   require_once("class.phpmailer.php");
   $mail = new PHPMailer();

   if (!isset($error_message) && !$mail->ValidateAddress($email)){
       $error_message = "You must specify a valid email address.";

   }

   if (!isset($error_message)) {

   $email_body = "";
   $email_body= $email_body . "Name: ". $name . "<br>";
   $email_body= $email_body . "Email: ". $email . "<br>";
   $email_body= $email_body . "Message: ". $message;

   $mail->SetFrom($email, $name);
   $address = "mohrcreations@cox.net";
   $mail->AddAddress($address, "Mohr Creations");
   $mail->Subject    = "Mohr Creations Contact form Submission |" . $name;
   $mail->MsgHTML($email_body);

      if($mail->Send()){
            header("Location: contact.php?status=thanks");
             exit;
        } else {
      $error_message = "There was a problem sending the email: " . $mail->ErrorInfo;

   } }


   }
if (isset($error_message)) {
    echo $error_message;
}
?>

<?php
 $pageTitle = "Mohr Creations | Contact";
 $section = "contact";
 include('header.php'); ?>  

    <div class="section page">

        <h2 align="center">Contact</h2>

                   <?php if (isset($_GET["status"]) AND $_GET["status"]  == "thanks"){ ?>
                <p>Thanks for the email! we&rsquo;ll be in touch shortly.</p>
                <?php } else{ ?>

    <section id="primary">





        <?php 
            if (!isset($error_message)) {
                echo '<p>Mohr Creations is a family owned metal art business. We make all custom works of art by hand. 
        If you have a special request or want to know more please email us through our webstie!  </p>';
            } else {
               echo '<p class="message">' . $error_message . '</p>'; 
            }
        ?> 


  <form method="post" action="contact.php">

  <table>
    <tr>
        <th>
    <label for="name">Name</label>
     </th>
       <td>
        <input type="text" name="name" id="name">
       </td>
   </tr>
   <tr>
        <th>
    <label for="email">Email</label>
     </th>
       <td>
        <input type="text" name="email" id="email">
       </td>
   </tr>
    <tr>
        <th>
    <label for="message">Message</label>
     </th>
       <td>
        <textarea name="message" id="message"></textarea>
       </td>
   </tr>
   <tr style="display: none;">
        <th>
    <label for="address">Address</label>
     </th>
       <td>
        <input type="text" name="address" id="address">
        <p> Leave this field blank</p>
       </td>
   </tr>
       </table>
       <input type="submit" value="Send">

  </form>
<?php } ?>
   </div>
      <?php include('footer.php'); ?>