[alanhutch]

Put

pawn Код:

new InJail[MAX_PLAYERS];

On the top of the script
On top of every command:

pawn Код:

if(InJail[playerid] == 1) return SendClientMessage(playerid, -1, "You can't use this command, you are in jail.");

In /jail

pawn Код:

InJail[playerid] = 1;

And in /unjail

pawn Код:

InJail[playerid] = 0;