—, I don't want buy a login/register system, but create my own and share for free for other people, thanks for the suggestion. Very good idea about MD5, is this the best algorithm or SHA? Is more secure send a hash in network than a plain password? Why? As I know, password needs be stored as encripted in database, I'm confused.
Whiteclaws I can't understand. SQL database is in Vertrigo's PHPMyAdmin, and the php files in www folder. All in my localhost and port 81.