In my index.php I have this code: function confirmNewUser($username, $user_email, $user_password, $user_password2, $random_num, $gfx_check) { global $stop, $EditedMessage, $sitename, $module_name, $minpass; include("header.php"); include("config.php"); $username = substr(htmlspecialchars(str_replace("\'", "'", trim($username))), 0, 25); $username = rtrim($username, "\\"); $username = str_replace("'", "\'", $username); $user_email = filter($user_email, "nohtml"); $user_viewemail = "0"; userCheck($username, $user_email); $user_email = validate_mail($user_email); $user_password = htmlspecialchars(stripslashes($user_password)); $user_password2 = htmlspecialchars(stripslashes($user_password2)); I think this SQL Injection don´t work in my site. That´t right?