Reason why suggest.php does not work now?

  if ($name == "" || $email == "" || $details == "") {
    echo "Please fill in the required fields: Name, Email and Details";
    exit;
  }


  if (@$_POST["address" != ""]) {
    echo "Bad form input";
    exit;
  }


  if (!PHPMailer::ValidateAddress($email)) {
    echo "Invalid Email Address";
    exit;
  }


  $email_body = "";
  $email_body .= "Name " . $name . "\n";
  $email_body .= "Email " . $email . "\n";
  $email_body .= "Details " . $details . "\n";

   // TO DO: Send email
  $mail = new PHPMailer;


  //Tell PHPMailer to use SMTP
  $mail->isSMTP();
  //Enable SMTP debugging
  // 0 = off (for production use)
  // 1 = client messages
  // 2 = client and server messages
  $mail->SMTPDebug = 2;
  //Set the hostname of the mail server
  $mail->Host = 'smtp.gmail.com';
  // use
  // $mail->Host = gethostbyname('smtp.gmail.com');
  // if your network does not support SMTP over IPv6
  //Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
  $mail->Port = 587;
  //Set the encryption system to use - ssl (deprecated) or tls
  $mail->SMTPSecure = 'tls';
  //Whether to use SMTP authentication
  $mail->SMTPAuth = true;
  //Username to use for SMTP authentication - use full email address for gmail
  $mail->Username = "sirajdevelopment123@gmail.com";
  //Password to use for SMTP authentication
  $mail->Password = "your password";

   //It's important not to use the submitter's address as the from address as it's forgery,
   //which will cause your messages to fail SPF checks.
   //Use an address in your own domain as the from address, put the submitter's address in a reply-to
   $mail->setFrom($email, $name);
   $mail->addAddress('sirajdevelopment123@gmail.com', 'Siraj Khan'); // Add a recipient

   $mail->isHTML(false);                                  // Set email format to HTML

   $mail->Subject = 'Personal Media Library suggestion from' . $name;
   $mail->Body = $email_body;

   if (!$mail->send()) {
       echo "Message could not be sent.";
       echo "Mailer Error: " . $mail->ErrorInfo;
       exit;
   }

   header("location:test.php?status=thanks");

<?php if (isset($_GET["status"]) && $_GET["status"] == "thanks") {
  echo "<p>Thanks for the email. I will check out your suggestion shortly!</p>";
} else { ?>

<p>If you think there is something I am missing, let me know.! Complete the form to send me an email.</p>

<form method="post" action="test.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="details">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>