Something

		 function registerUser($username, $username_conf, $password, $password_conf, $email, $email_conf, $secure_code, $age_conf) {
			function checkUsername($username, $username_conf) {
				
			}
		    
		    function checkPassword($password, $password_conf) {
				
			}
			
			function checkEmail($email, $email_conf) {
				
			}
		    
		    function checkCode($secure_code) {
				
			}
		}