Anyone can help me?.

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_STRING));
    $email = trim(filter_input(INPUT_POST,"email",FILTER_SANITIZE_EMAIL));
    $details = trim(filter_input(INPUT_POST,"details",FILTER_SANITIZE_SPECIAL_CHARS));

    if ($name == "" || $email == "" || $details == "") {
        echo "Please fill in the required fields: Name, Email and Details";
        exit;
    }
    if ($_POST["address"] != "") {
        echo "Bad form input";
        exit;
    }

    echo "<pre>";
    $email_body = "";
    $email_body .= "Name " . $name . "\n";
    $email_body .= "Email " . $email . "\n";
    $email_body .= "Details " . $details . "\n";
    echo $email_body;
    echo "</pre>";

    //To Do: Send Email
    header("location:suggest.php?status=thanks");
}

$pageTitle = "Suggest a Media Item";
$section = "suggest";

include("inc/header.php"); ?>

<div class="section page">
    <div class="wrapper">
        <h1>Suggest a Media Item</h1>
        <?php if (isset($_GET["status"]) && $_GET['status'] == "thanks") {
            echo "<p>Thanks for the email! I&rsquo;ll check out your suggestion shortly!</p>";
        } else {
        ?>
        <p>If you think there is something I&rsquo;m missing, let me know! Complete the form to send me an email.</p>
        <form method="post" action="process.php">
            <table>
            <tr>
                <th><label for="name">Name</label></th>
                <td><input type="text" id="name" name="name" /></td>
            </tr>
            <tr>
                <th><label for="email">Email</label></th>
                <td><input type="text" id="email" name="email" /></td>
            </tr>
            <tr>
                <th><label for="name">Suggest Item Details</label></th>
                <td><textarea name="details" id="details"></textarea></td>
            </tr>
            <tr style="display:none">
                <th><label for="address">Address</label></th>
                <td><input type="text" id="address" name="address" />
                <p>Please leave this field blank</p></td>
            </tr>
            </table>
            <input type="submit" value="Send" />
        </form>
        <?php } ?>
    </div>
</div>

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