[1sbedx]

PHP Code:

#include "streamer"
new
    AreaID;
AreaID = CreateDynamicSphere(0.0, 0.0, 3.0, 2.0);
public OnPlayerEnterDynamicArea(playerid, areaid) {
    if (areaid == AreaID) {
        ShowPlayerDialog(playerid, ...);
    }
    return 1;
}