Aide aux syntaxe php

include("connexion.php");
$message = '';
	if (isset($_POST['username'])) {
		$username = $_POST['username'];
		$fname = $_POST['fname'];
		$lname = $_POST['lname'];
		$email = $_POST['email'];
		$pass1 = $_POST['pass1'];
		$pass2 = $_POST['pass2'];
	if ((!username) || (!fname) || (!lname) || (!email) || (!pass1) || (pass2)) {
			$message = "please check out your informations";
		}else{
			if($pass1 != $pass2){
			$message = "your password 2 is wrong"
		
			}else{
			$username = preg_replace("#[^0-9a-z]#i","","$username");
			$fname = preg_replace("#[^0-9a-z]#i","","$fname");
			$lname = preg_replace("#[^0-9a-z]#i","","$lname");
			$pass1 = sha1($pass1);
			$email = mysql_real_escape_string($email);
			$user_query = mysql_query("SELECT username FROM members WHERE username='$username' LIMIT 1  ")or die('could not check the username');
			$count_username = mysql_num_rows($user_query);
			$email_query = mysql_query("SELECT email FROM members WHERE email='$email' LIMIT 1  ")or die('could not check the email');
			$count_email = mysql_num_rows($email_query);
			if ($count_username > 0){
				$message = 'your username is already in use'
				}else if ($count_email > 0){
					$message = 'this email is already in use'
					
				}else {
					$ip_adress = $_SERVER[REMOTE_ADDR];
					$query = mysql_query("INSERT INTO members (username, firstname, lastname, email, password, ip_adress,
					signup_date) VALUES ('$username','$fname','$lname','$email','$pass','$ip_adress, now()") or die("could not insert data");
					$members_id = mysql_insert_id();
					mkdir("users/$members_id",0755);
					$message = 'you have now been registered'
				}
			}
		}
	}