Submitting contact form after making changes, now displays blank screen

require_once ("inc/phpmailer/class.phpmailer.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 a name, email and message.";
        }

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

            }
        }

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

        }

        // require_once ("inc/phpmailer/class.phpmailer.php");
        // $mail = new PHPMailer();
        // $mail->ValidateAddress($email);
        // if (!$mail->ValidateAddress($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;


                // Test
                // echo $email_body;

                // TODO: Send Email
                $mail->SetFrom($email, $name);
                $address = "orders@shirts4mike.com";
                $mail->AddAddress($address, "Shirts 4 Mike");
                $mail->Subject = "Shirts 4 Mike Contact Form Submission | " . $name;
                // $mail->AltBody = "To view the message, please use an HTML compatible email viewer";
                $mail->MsgHTML($email_body);
                // $mail->AddAttachment("img/phpmailer.gif");
                // $mail->AddAttachment("img/phpmailer_mini.gif");
                if ($mail->Send() ) { 
                    // This redirects user ot this page
                    // adding a variable after address are sent to server alongwith the wbpage
                    // avaible using $_GET
                    // ?status=thanks

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

    }

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

?><?php 
$pageTitle = "Contact Mike";
$section = "contact";
include ('inc/header.php'); ?>


    <div class="section page">

        <div class="wrapepr">
            <h1>Contact</h1>

            <?php if (isset ($_GET["status"] )  AND $_GET["status"] == "thanks") { ?>
                <p>Thank you for the email!</p>
            <?php } else { ?>

                <?php 
                    if (!isset($error_message)) {
                        echo '<p>I&rsquo;d love to hear from you! Complete the form to send me an email</p>';
                    }else {
                        echo '<p class="message">' . $error_message;
                    }
                ?>

                <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>
                                    <textarea name="address" id="address"></textarea>
                                    <p>Humans (and frogs): please leave this field blank.</p>
                                </td>
                            </tr>
                        </table>
                        <input type="submit" value="Send">
                    </form>
                <?php } ?>
                </div>

            </div>


<?php include ('inc/footer.php'); ?>