<?php
mysql_connect ('localhost', 'root', '');
mysql_select_db ('admin');

if (isset($_POST['submit'])) {
$email = htmlspecialchars(strip_tags($_POST['email']));
 if(filter_var($email, FILTER_VALIDATE_EMAIL) && preg_match('/@.+\./', $email)) {
  if (!get_magic_quotes_gpc()) {
   $email = addslashes($email);
  }
  $sql = "INSERT IGNORE INTO registrants (email) VALUES ('$email')";
  $result = mysql_query($sql) or print("Can't insert into table.<br />" . $sql . "<br />" . mysql_error());
  mysql_close();
  echo "<p id='feedback'>Address added successfully!</p>";
 }
 else {
 echo "<p id='feedback'>Invalid Email address!</p>";
}
}
?>