[Immortal99]

Firstly on top of ur script add:
new aDuty[MAX_PLAYERS];

Secondly Under OnPlayerConnect add:
aDuty[playerid] = 0; // This will set the players admin duty off when he connects
Do the same under OnPlayerDisconect


And then here is the code fixed:

PHP код:

.CMD:aduty(playerid, params[]) 
{ 
    if(adlvl[playerid]<1) return 0; 
    new pname[64], str[150]; 
    GetPlayerName(playerid, pname, sizeof(pname)); 
    for(new i=0; i< MAX_PLAYERS; i++) 
    { 
        if(aDuty[playerid] == 0) 
        { 
            SetPlayerMarkerForPlayer(playerid, i, (GetPlayerColor(playerid))); 
               format(str,sizeof(str),"Admin[%s] Is Now [ON] Duty", pname); 
            SendClientMessageToAll(COLOR_GREEN,str); 
            aDuty[playerid] = 1; 
            //  You don't return 1 else it wouldn't set him on duty
        } 
        else if (aDuty[playerid] == 1) // This Will check if he's on duty
        { 
            SetPlayerMarkerForPlayer(playerid, i, 00); 
               format(str,sizeof(str),"Admin[%s] Is Now [OFF] Duty", pname); 
            SendClientMessageToAll(COLOR_GREEN,str); 
            SetPlayerHealth(playerid, 100); 
            SetPlayerArmour(playerid, 100); 
            aDuty[playerid] = 0; 
            // Again u don't return 1
        } 
        return 1; 
         
    } 
    return 1; 
} 


I did this on my mobile so I didn't test it, but I think it should work