Validating email blues

Okay, I'm working a database project using php and mysql. Just to save time re-writing my code, I copied and pasted into the editor so I can make my changes to finish the project on time. There is an issue though and not sure why it's giving me an error. I entered a valid email addresss on the email field on the form. Before I go into further details, here is my link and code.

<?php
if (isset($_POST['submitted'])){
          require_once('Connections2/orderform.php');
$fields = array(
          'name',
          'email',
);
foreach($fields as $fieldName) {
          if(isset($_POST[$fieldName]) and safe(trim(stripslashes($_POST[$fieldName]))) !==''){
                    $$fieldName = safe(trim(stripslashes($_POST[$fieldName])));
          }else {
                                        $errors[] = "Please enter your". $fieldName .""; //code to validate fields
          }
          if(filter_var($email, FILTER_VALIDATE_EMAIL) == true){
          } else {
                    $errors[] = 'Please enter a valid email address';
          }
}
if(!isset($errors)){
          $query = "SELECT id FROM orders WHERE email='$email'";
          $result = mysql_query($query);
          if(mysql_num_rows($result) == 0) {
$query = "INSERT INTO orders (email, name, address, city, state, zip, product, amount, instructions, date) 
VALUES ('$email', '$name', '$address', '$city', '$state', '$zip,'$product', '$amount', '$instructions', NOW())"; //databasse connection
          $result = mysql_query ($query); 
if ($result){
          $url = 'http://'. $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']);
          if ((substr($url, -1) == '/') || (substr($url, -1) == '\\')) {
                    $url = substr ($url, 0, -1);
          }
          $url .= '/ordersubmitted.php';
          header("Location: $url"); //This is the line of error that is reporting after submitting to the database
          exit();
          } else {
                    $errors[] = 'You could not be registered due to a system error. We apologize for any inconvenience.';
                    $errors[] = mysql_error() . '<br /><br />Query: ' . $query;
          }
          } else {
                    $errors[] = 'The email address has already been registered.';
          }
          }
          mysql_close();
          } else { 
                    $errors = NULL;
          }
if (!empty($errors)){
                              echo '<h1 id="mainhead">Error!</h1>
                    <p class="error">The following error(s) occurred:<br />';
                    foreach($errors as $msg) {
                              echo " - $msg<br/>\n";
                    }
                    echo '</p><p>Please try again.</p><p><br/></p>';
          }
function safe($string) 
          { 
                    $pattern = "/\r|\n|\%0a|\%0d|Content\-Type:|bcc:|to:|cc:/i"; 
                    return preg_replace($pattern, '', $string); 
          }
?>

http://www.rodriguezstudios.com/orderform

The error is coming from this line of code

if(filter_var($email, FILTER_VALIDATE_EMAIL) == true){

          } else {

                    $errors[] = 'Please enter a valid email address';

          }

}

The html email field is

<input name="email" type="text" id="email">

But i checked the other forms and the information is submitted successfully. What is going on? Thanks for your help in advanced!