Multiple registration pages

A client of mine wanted to have multiple registration pages with different fields so I wrote this script. I'm sure it would have been better to make a module but I don't really know how. Anyone want to help?

Here's how it works

1.) Make a node and paste this into it. Make the path /formRelay

if(isset($_POST['email'])){

	function is_valid_email($email) {
	  $result = TRUE;
	  if(!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $email)) {
		$result = FALSE;
	  }
	  return $result;
	}
	
	function random_password($length = 10) {
	  // This variable contains the list of allowable characters for the
	  // password. Note that the number 0 and the letter 'O' have been
	  // removed to avoid confusion between the two. The same is true
	  // of 'I', 1, and l.
	  $allowable_characters = 'abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789';
	
	  // Zero-based count of characters in the allowable list:
	  $len = strlen($allowable_characters) - 1;
	
	  // Declare the password as a blank string.
	  $pass = '';
	
	  // Loop the number of times specified by $length.
	  for ($i = 0; $i < $length; $i++) {
	
		// Each iteration, pick a random character from the
		// allowable string and append it to the password:
		$pass .= $allowable_characters[mt_rand(0, $len)];
	  }
	
	  return $pass;
	}
	
	function validate_pass($pass,$pass2) {
	  if ($pass != $pass2) return t('Both passwords must match.');
	  if (!strlen($pass)) return t('You must enter a password.');
	  if (ereg(' ', $pass)) return t('The password cannot contain spaces.');
	  if (ereg("[^\x80-\xF7[:graph:]]", $pass)) return t('The password contains an illegal character.');
	  if (preg_match('/[\x{80}-\x{A0}'.          // Non-printable ISO-8859-1 + NBSP
					   '\x{AD}'.                 // Soft-hyphen
					   '\x{2000}-\x{200F}'.      // Various space characters
					   '\x{2028}-\x{202F}'.      // Bidirectional text overrides
					   '\x{205F}-\x{206F}'.      // Various text hinting characters
					   '\x{FEFF}'.               // Byte order mark
					   '\x{FF01}-\x{FF60}'.      // Full-width latin
					   '\x{FFF9}-\x{FFFD}]/u',   // Replacement characters
					   $pass)) {
		return t('The password contains an illegal character.');
	  }
	  if (strlen($pass) > 30) return t('The password is too long: it must be less than 30 characters.');
	  $min_pass_length = variable_get('toboggan_min_pass_length', 0);
	  if ($min_pass_length && strlen($pass) < $min_pass_length) return t("The password is too short: it must at least $min_pass_length characters.");
	  return 1;
	}
	
	
	//email processing
	$email = $_POST['email'];
	unset($_POST['email']);
	//see if email address is valid
	if(is_valid_email($email)){
		$query = "select uid from users where name='".$email."'";
		$emailSearch = db_fetch_object(db_query($query));
		//If the email address exists then set the UID, otherwise set 0
		if(is_object($emailSearch)){
			//$userID = user_load(array($emailSearch->uid));
			$userID = $emailSearch;
		}
		else{
			$userID = 0;
		}
	}
	//The email address is not valid
	else{
		 $errors['email'] = 'A valid email address was not entered';
	}
	
	//Password processing
	if(isset($_POST['password1'])){
		$valid_pass = validate_pass($_POST['password1'],$_POST['password2']);
		if($valid_pass == 1){
			$password = $_POST['password1'];
		}
		else{
			$errors['password'] = $valid_pass;	
		}
	}
	else{
		$password = random_password();
	}	
	
	//determine emails to be sent
	if(isset($_POST['emailToIX'])){
		$emailToIX = $_POST['emailToIX'];
		unset($_POST['emailToIX']);
	}
	if(isset($_POST['emailToUser'])){
		$emailToUser = $_POST['emailToUser'];
		unset($_POST['emailToUser']);
	}
	
	//return for errors
	if(isset($_POST['returnNode'])){
		$returnNode = $_POST['returnNode'];
		unset($_POST['returnNode']);
	}	
	
	//set roles
	if(isset($_POST['roles'])){
		$roles = $_POST['roles'];
		unset($_POST['roles']);
	}		
	
	unset($_POST['submit']);
	
	
	
	//Check if required & add variables
	foreach($_POST as $key => $value){
		if(substr($key, 0,9) == "required-"){
			if(!is_array($value) && $value == ""){
				$errors['fields'][substr($key, 9)] = $key;
			}
			$data[substr($key, 9)] = $value;
		}
		else{
			$data[$key] = $value;
		}
	}

	
	if(isset($errors)){
	//There are errors so don't create the account yet.  Instead, return the user to the form and show error messages
		$_SESSION['errorFields'] = $errors;
		$_SESSION['fillFields'] = $data;
		$_SESSION['fillFields']['email'] = $email;
		drupal_goto($returnNode);
	}
	else{
		//Create the new user!
		if($userID == 0){
			$data['pass'] = $password;
			
				$data['name'] = $email;
				$data['mail'] = $email;
					
			
			//add roles		
			if(isset($_POST['roles'])){
				$data['roles'] = $roles;
			}
			
			
			$data['status'] = isset($_POST['status']) ? $_POST['status'] : 1;
			
			
			//create the account
			$account = user_save($userID, $data);	
			
			//send user the mail
			$variables = array('!username' => $email, '!site' => variable_get('site_name', 'Drupal'), '!password' => $password, '!uri' => $base_url, '!uri_brief' => substr($base_url, strlen('http://')), '!mailto' => $mail, '!date' => format_date(time()), '!login_uri' => url('user', NULL, NULL, TRUE), '!edit_uri' => url('user/'. $account->uid .'/edit', NULL, NULL, TRUE), '!login_url' => user_pass_reset_url($account));
			
			$from = variable_get('site_mail', ini_get('sendmail_from'));
			$subject = _user_mail_text('welcome_subject', $variables);
			$body = _user_mail_text('welcome_body', $variables);
			drupal_mail('user-register-welcome', $email, $subject, $body, $from);
			drupal_set_message(t('Further instructions have been sent to your e-mail address.')); 
			
			//If the user is not already logged in then log them in as the new account
			global $user;
			if($user->uid == 0){
				user_authenticate($email, trim($password));
			}
			//drupal_goto();
		}
		
		//The user already exists so update the user's info!
		else{
			
			//add roles		
			if(isset($_POST['roles'])){
				$data['roles'] = $userID->roles;
			}
					
			//update the account
			$account = user_save($userID, $data);	
			
			//send the mail -- this time a link for them to change their password
			$from = variable_get('site_mail', ini_get('sendmail_from'));
			drupal_set_message(t('Your account has been updated and further instructions have been sent to your e-mail address.')); 			
			$variables = array('!username' => $email, '!site' => variable_get('site_name', 'Drupal'), '!login_url' => user_pass_reset_url($account), '!uri' => $base_url, '!uri_brief' => substr($base_url, strlen('http://')), '!mailto' => $account->mail, '!date' => format_date(time()), '!login_uri' => url('user', NULL, NULL, TRUE), '!edit_uri' => url('user/'. $account->uid .'/edit', NULL, NULL, TRUE)); 
			$subject = _user_mail_text('pass_subject', $variables); 
			$body = _user_mail_text('pass_body', $variables); 
			$mail_success = drupal_mail('user-pass', $email, $subject, $body, $from); 		
		}
		
		//send out all mail
		if(isset($emailToIX)){
			foreach($data as $key=>$value){
				$mailMessage .= "$key: $value \n";
			}
			drupal_mail('New Website Registration', $emailToIX, 'New Website Registration', $mailMessage, 'user@drupal.org');			
		}
		
	}
}

2.) Put this in a file on your server and call it formrly.inc:

ef(isset($_SESSION['fillFields'])){
                foreach($_SESSION['fillFields'] as $key=>$value){
                $fieldValues[$key] .= "value=\"$value\"";
        }
}
if(isset($_SESSION['errorFields']['fields'])){
        foreach($_SESSION['errorFields']['fields'] as $key=>$value){
                $fieldValues[$key] .= " class=\"form-text error\" ";
        }
}
//print_r($_SESSION['fillFields']);
if(isset($_SESSION['errorFields'])){
        echo '<div id="message"><div class="messages error"><ul>';
        echo "<li>Required fields are unfilled</li>";
}

if(isset($_SESSION['errorFields']['email'])){
        $fieldValues['email'] .= " value=\"".$_SESSION['fillFields']['email']."\"class=\"form-text error\" ";
        echo "<li>".$_SESSION['errorFields']['email']."</li>";
}

if(isset($_SESSION['errorFields']['password'])){
        $fieldValues['password'] .= " class=\"form-text error\" ";
        echo "<li>".$_SESSION['errorFields']['password']."</li>";
}
if(isset($_SESSION['errorFields'])){
        echo '</ul></div></div>';
}

3.) Make profile fields for any forms you want to use and create the forms:

include("/usr/home/harry100/formrly.inc");

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