[nezo2001]

If you save the data OnPlayerDisconnect:

PHP код:

CMD:changepassword(playerid, params[])
{
    new pass[128], hashpass[129];
    if(sscanf(params,"s[128]",pass)) return SendClientMessage(playerid, -1, "Usage: /changepassword [Password]");
        WP_Hash(hashpass, sizeof(hashpass), pass);
    PlayerInfo[playerid][Password] = hashpass;
    return 1;
} 


Edited.