[Kraeror]

Today I did it, I had the same question, so I found it! Just use Whirlpool and hash password.
Something like this:

At the top of your gamemode:

PHP код:

native WP_Hash(buffer[], len, const str[]); 


To your OnPlayerDialog (if your login/register (It's the same in the both- login and register) system is using that else just replace inputtext with the variable you want):

PHP код:

new HashedPassword[129];
WP_Hash(HashedPassword, sizeof(HashedPassword), inputtext); 


And you have to use the same hashing method in PHP!

Like this:

PHP код:

$ThePassword = strtoupper(hash("whirlpool", $_POST['Password'])); 


You have to download Whirlpool plugin firstly!