[jlalt]

You're using ini write string while udb_hash return value is integer.

PHP Code:

CMD:changepass(playerid, params[])
{
    new player[MAX_PLAYER_NAME],string[256]; // the player name, // and the string for the path
    if(sscanf(params, "s[256]", params))return SendClientMessage(playerid, -1, "/changepassword [password]");//sscanf, what ever u write after /change
    GetPlayerName(playerid, player, MAX_PLAYER_NAME);
    format(string, 256, "Users/%s.ini", player);//put ur ini path here but keep the player
    new INI:file = INI_Open(string); // opening the path
    //INI_WriteString(file,  "Password", udb_hash(params));//writing in the path
    INI_WriteInt(file, "Password", udb_hash(params));
    INI_Close(file);// close the file
    return 1;

}