PHP form strange behaviors

Question

I have a very basic PHP form coded and whenever I look at it in Live View the bottom third of the processing code appears at the top of the webpage. Uploaded the code does not appear on the webpage and the form works fine, except that the dropdown initial values I have set are ignored.
The form URL:  http://affordableroofingcontractors.com/contact-us.php
The dropdown code: (I want "select one" displayed but the form shows "Re-roofing" instead!?)
<select name="service" id="service">
            <option value="0" selected="selected"
            <?php if (!$_POST ||$_POST['service'] =='0') {
    echo 'selected="selected"'; }?>>--select one--</option>
            <option value="Proactive Roof Maintenance"
            <?php if (!$_POST ||$_POST['service'] =='Proactive Roof Maintenance') {
    echo 'selected="selected"'; }?>>Proactive Roof Maintenance</option>
            <option value="Roof Repairs"
             <?php if (!$_POST ||$_POST['service'] =='Roof Repairs') {
    echo 'selected="selected"'; }?>>Roof Repairs</option>
            <option value="Re-roofing"
             <?php if (!$_POST ||$_POST['service'] =='Re-roofing') {
    echo 'selected="selected"'; }?>>Re-roofing</option>
          </select>
The processing code:
<?php
if (array_key_exists('submit', $_POST)){
//mail processing script
// remove escape characters from POST array
if (PHP_VERSION < 6 && get_magic_quotes_gpc()) {
  function stripslashes_deep($value) {
    $value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value);
    return $value;
  $_POST = array_map('stripslashes_deep', $_POST);
if (!empty($_POST['area'])) {
  $to = '[email protected]';
  $subject = 'SUSPECTED BOT SUBMISSION from ACI quote form';
} else {
$to = '[email protected]';
$subject = 'ACI CONTACT FORM';
//list expected fields
$expected = array('name','company','phone','email','service','building','comments');
//set required fields
$required = array('name','email','phone');
//create empty array for any missing fields
$missing = array();
//assume there is nothing suspect
$suspect = false;
//create a pattern to locate suspect phrases
$pattern = '/Content-Type:|Bcc:|Cc:/i';
   // function to check for suspect phrases
  function isSuspect($val, $pattern, &$suspect) {
  // if the variable is an array, loop through each element and pass it recursively back to the same function
if (is_array($val)) {
      foreach ($val as $item) {
     isSuspect($item, $pattern, $suspect);
    else {
      // if one of the suspect phrases is found, set Boolean to true
   if (preg_match($pattern, $val)) {
        $suspect = true;
//check the Post array and any subarrays for suspect content
isSuspect($_POST, $pattern, $suspect);
if ($suspect) {
$mailSent = false;
unset($missing);
} else {
//process POST variables
foreach ($_POST as $key => $value){
//assign to temporary variable and strip whitespace if not an array
$temp = is_array($value) ? $value : trim($value);
//if empty and required, add to $missing array
if (empty($temp) && in_array($key, $required)) {
  array_push($missing, $key);
} elseif (in_array($key, $expected)) {
//otherwise, assign to a variable of the same name as $key
  ${$key} = $temp;
//validate the email address
if (!empty($email)) {
// regex to identify illegal characters in email address
$checkEmail = '/^[^@]+@[^\s\r\n\'";,@%]+$/';
//reject the email address if it doesn't match
if (!preg_match($checkEmail, $email)){
  $suspect = true;
  $mailSent = false;
  unset($missing);
//go ahead only if not suspect and all required fields OK
if (!$suspect && empty($missing)) {
//build the message
$message = "Name: $name\r\n\r\n";
$message .= "Company: $company\r\n\r\n";
$message .= "Phone: $phone\r\n\r\n";
$message .= "Email: $email\r\n\r\n";
$message .= "Service Needed: $service\r\n\r\n";
$message .= "Type of Building: $building\r\n\r\n";
$message .= "Comments: $comments";
//limit line length to 70 characters
$message = wordwrap($message, 70);
//create additional headers
$headers = "From: $email>\r\n";
$headers .= 'Content-Type: text/plain; charset=utf-8';
if (!empty($email)) {
  $headers .= "\r\nReply-To: $email";
//send it
$mailSent = mail($to, $subject, $message, $headers);
if ($mailSent) {
//$missing is no longer needed if email is sent, so unset it
unset($missing);
?>

Answer 1

Hi!
To select php form you should create a  menu,  fill out the type of "choice of one item of many" or "Select multiple  items from the many." Must be inside FORM element and have at the start  or end tags. It contains several elements OPTION, otherwise it makes no  sense.
Example:
<HTML> <body>
<form method='post' action='all.php'>
     Color Scheme: <br>
    <SELECT NAME="color">
      <OPTION VALUE="Standard" SELECTED> </ OPTION>
      <OPTION VALUE='Brick'> Brick </ OPTION>
      <OPTION VALUE='Gray Mouse'> Gray Mouse </ OPTION>
      <OPTION VALUE='Ship Bottom'> Ship Bottom </ OPTION>
      <OPTION VALUE='Black Night'> Black Night </ OPTION>
      <OPTION VALUE='White Light'> White Light </ OPTION>
      <OPTION VALUE='Yellow List'> Yellow List </ OPTION>
      <OPTION VALUE='Pink Myth'> Pink Myth </ OPTION>
      <OPTION VALUE='Green USD'> Green USD </ OPTION>
      <OPTION VALUE='Standard'> Standard </ OPTION>
    </ SELECT>
<input type='submit' name='submit' value='go'>
</ form>
</ body> </ HTML>2