Did you really find it easier to make a thread instead of testing it yourself with 2 lines of code? You could also have taken a look at the function's code in github:
PHP Code:
//Builds the menu string for a specific page (set title to 0 to not include title)
//page indices start at 0!
static cell AMX_NATIVE_CALL menu_display(AMX *amx, cell *params)
{
auto handle = params[2];
GETMENU(handle);
int player = params[1];
int page = params[3];
CPlayer* pPlayer = GET_PLAYER_POINTER_I(player);
if (!CloseNewMenus(pPlayer))
{
LogError(amx, AMX_ERR_NATIVE, "Plugin called menu_display when item=MENU_EXIT");
return 0;
}
if (!g_NewMenus[handle])
{
LogError(amx, AMX_ERR_NATIVE, "Invalid menu id %d (was previously destroyed).", handle);
return 0;
}
int time = -1;
if (params[0] / sizeof(cell) >= 4)
time = params[4];
if (time < 0)
pPlayer->menuexpire = INFINITE;
else
pPlayer->menuexpire = gpGlobals->time + static_cast<float>(time);
return pMenu->Display(player, page);
}
As you can see there's no loop in the code that displays it to all players when the index is set to 0.