[MadeMan]

I see 2 problems in your code.

First is that it only works for playerid 0.

To fix that:

pawn Код:

public IsPlayerInArea()
{
    for(new i=0; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i))
        {
            SendClientMessage(i,COLOR_WHITE,"Timer test - Message is showing every one second !");
            new Float:x, Float:y, Float:z;
            GetPlayerPos(i, x, y, z);
            if (x > FORBIDZONE1_X_MIN && x < FORBIDZONE1_X_MAX && y > FORBIDZONE1_Y_MIN && y < FORBIDZONE1_Y_MAX)
            {
                SendClientMessage(i,COLOR_WHITE,"Your in the area lol");
            }
            if (x > FORBIDZONE2_X_MIN && x < FORBIDZONE2_X_MAX && y > FORBIDZONE2_Y_MIN && y < FORBIDZONE2_Y_MAX)
            {
                SendClientMessage(i,COLOR_WHITE,"Your in the area lol");
            }
            if (x > FORBIDZONE3_X_MIN && x < FORBIDZONE3_X_MAX && y > FORBIDZONE3_Y_MIN && y < FORBIDZONE3_Y_MAX)
            {
                SendClientMessage(i,COLOR_WHITE,"Your in the area lol");
            }
            if (x > FORBIDZONE4_X_MIN && x < FORBIDZONE4_X_MAX && y > FORBIDZONE4_Y_MIN && y < FORBIDZONE4_Y_MAX)
            {
                SendClientMessage(i,COLOR_WHITE,"Your in the area lol");
            }
            if (x > FORBIDZONE5_X_MIN && x < FORBIDZONE5_X_MAX && y > FORBIDZONE5_Y_MIN && y < FORBIDZONE5_Y_MAX)
            {
                SendClientMessage(i,COLOR_WHITE,"Your in the area lol");
            }
        }
    }
}

And secondly, your coordinates are messed up.
Max should be bigger than Min.

pawn Код:

#define FORBIDZONE1_X_MAX -4087.256
#define FORBIDZONE1_X_MIN -864.1628
#define FORBIDZONE1_Y_MAX 2989.536
#define FORBIDZONE1_Y_MIN 4063.901

2989.536 is smaller than 4063.901, so it's wrong.

Should be like this:

pawn Код:

#define FORBIDZONE1_X_MAX -864.1628
#define FORBIDZONE1_X_MIN -4087.256
#define FORBIDZONE1_Y_MAX 4063.901
#define FORBIDZONE1_Y_MIN 2989.536