Untitled

<!DOCTYPE HTML>
<head>
<title>Form validation </title>
</head>
<body>
<?php
if (isset($_POST['submit'])) {
////////////////////////////////////////////////////////////////////
//checking names
///////////////////////////////////////////////////////////////////

if(empty($_POST['fname']))
$msg_fname = "You must supply your forname";
$fname_sub = $_POST['fname'];
$regexf = '/^[a-zA-Z ]*$/';
preg_match($regexf, $fname_sub, $fname_matches);
if(!$fname_matches[o])
$msg2_fname = "please check forname";

///////////////////////////////////////////////////////////////////

if(empty($_POST['lname']))
$msg_lname = "You must supply your surname";
$lname_sub = $_POST['lname'];
$regexl= '/^[a-zA-Z ]*$/';
preg_match($regexl, $lname_sub, $lname_matches);
if(!$lname_matches[o])
$msg2_lname = "please check surname";

////////////////////////////////////////////////////////////////////
//check email
////////////////////////////////////////////////////////////////////

if(empty($_POST['email']))
$msg_email = "You must supply your email";
$email_sub = $_POST['email'];
$email_pattern = '/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/';
preg_match($email_pattern, $email_sub, $email_matches);
if(!$email_matches[0])
$msg2_email = "Must be of valid email format";


}
?>

<?php
// validation complete
if(isset($_POST['submit'])){
if($msg_fname=="fname" && $msg2_fname=="fname" && $msg_lname=="lname" && $msg2_lname=="lname" && $msg_email=="" &&  $msg2_email=="");
$msg_success = "You filled this form up correctly";
}
?>
<div class="container">
<?php echo "<h3 class='success_msg'>".$msg_success."</h3>"; ?>
<form id="registration_form" method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">

  <label>Forename<span class="note">*</span>:</label>
  <input type="text" name="fname"  value="<?php echo $_POST['fname']; ?>">
  <?php echo "<p class='note'>".$msg_fname."</p>";?>
  <?php  //echo "<p class='note'>".$msg2_fname."</p>";?>

    <label>Surname<span class="note">*</span>:</label>
  <input type="text" name="lname"  value="<?php echo $_POST['lname']; ?>">
  <?php echo "<p class='note'>".$msg_lname."</p>";?>
  <?php //echo "<p class='note'>".$msg2_lname."</p>";?>

  <label>Email address<span class="note">*</span>:</label>
  <input type="text" name="email" value="<?php echo $_POST['email']; ?>">
   <?php echo "<p class='note'>".$msg_email."</p>";?>
  <?php echo "<p class='note'>".$msg2_email."</p>";?>

  <button type="submit" class="" name="submit">send</button>
</form>
</div>
</body>