[Banana_Ghost]

PHP код:

new bool:pizzarobtdentry[MAX_PLAYERS char];//Creating a variable to store if the player is in the checkpoint or not.
//Your code
if(checkpointid == PizzaRob)
{
    SendClientMessage(playerid, GRIS, "Type /robstore to this store.");
    TextDrawShowForPlayer(playerid, pizzabox);
    TextDrawShowForPlayer(playerid, pizza);
    pizzarobtdentry{playerid} = true;//Setting the variable to true, because they are in the checkpoint.
}
    
public OnPlayerText(playerid,text[]){
    if(pizzarobtdentry{playerid} == true)//If they are in the checkpoint, they can use the chat to respond to it.
    {
        switch(strval(text))//Switch through the number they type in.
        {
            case 1: GivePlayerWeapon(playerid,22,50);//Give the player the weapon they typed the option for
            case 2: GivePlayerWeapon(playerid,30,50);
            case 3: GivePlayerWeapon(playerid,31,50);
        }
        TextDrawHideForPlayer(playerid,pizzabox);//hide the textdraws
        TextDrawHideForPlayer(playerid,pizza);
        pizzarobtdentry{playerid} = false;//Set the variable to false
        return 0;//return 0 so that the number they type will not display in the chat.
    }
    return 1;
} 


Remember to reset the variable upon death, spawn, connect, etc to prevent players from using it without entering the checkpoint, after leaving the checkpoint, or other instances.