[Threshold]

pawn Код:

if(!strcmp("/afk", cmdtext, true))
{
     SendClientMessage(playerid, 0xFFFF00C8 , "You have activated AFK mode. Use /back to return to the game!");
     SetPlayerHealth(playerid, 99999.0);
     TogglePlayerControllable(playerid, 0);
     new fstr[55], name[MAX_PLAYER_NAME];
     GetPlayerName(playerid, name, sizeof(name));
     format(fstr, sizeof(fstr), "[INFO] Player %s is now AFK.", name);
     SendClientMessageToAll(-1, fstr);
     return 1;
}

Sources:
https://sampwiki.blast.hk/wiki/Format
https://sampwiki.blast.hk/wiki/GetPlayerName
https://sampwiki.blast.hk/wiki/SendClientMessageToAll