что в моем коде не так???
есть ошибки ??

<?php
$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$login = $_POST['username'];
$password = $_POST['password'];
$r_password = $_POST['r_password'];


if( isset($fname) && !empty($fname) && $fname != '' && $fname != ' ' &&
	isset($lname) && !empty($lname) && $lname != '' && $lname != ' ' &&
	isset($email) && !empty($email) && $email != '' && $email != ' ' &&
	isset($login) && !empty($login) && $login != '' && $login != ' ' &&
	isset($password) && !empty($password) && $password != '' && $password != ' ' &&
	isset($r_password) && !empty($r_password) && $r_password != '' && $r_password != ' ' 
)
	if($password == $r_password){
	function connect(){
		$conn = mysql_connect('localhost','root','') or die(mysql_error());
		mysql_select_db('test') or die(mysql_error());
		if(mysql_query("SET NAMES utf8")){
			return true;
			}
			else {
			return false;	
			}
		
	}

	if(connect()){
	function userExists($login){
	$login = mysql_real_escape_string($login);
	$qq = mysql_query("SELECT COUNT(`id`) FROM `users` WHERE `username` = '$login'");
	if($qq){ return true;}else {return false;}
}
	if(userExists($login) == false){
		function registerUsers(){		
				$q = "INSERT INTO users(FirstName,LastName,E-Mail,Login,password) VALUES('".$fname."','".$lname."','".$email."','".$login."','".$password."')";
				
				$query = mysql_query($q);
				if($query){
					return true;
					}
				else {
					return false;
					}
				}
				
		if(registerUsers()){ echo 'Reg';}else{ echo 'chreg';}
		} else echo "This UserName is busy";

		
	}
		
	else { echo "parol@ ban@ gyada noric gri nuyn@ chi balam"; }

	}
else {
	echo 'Please fill out all fields.';
}

?>