Try to check oldorigin of the player for touching with this trigger, if it doesn't touch the trigger then you can print this message.
Or you can check if player touched this trigger in previous frame:
PHP Code:
new bool:g_touchedPrevFrame[MAX_PLAYERS + 1];
new bool:g_touchedThisFrame;
public client_putinserver(player) {
g_touchedPrevFrame[player] = false;
}
public client_PreThink(player) {
g_touchedThisFrame = false;
}
public client_PostThink(player) {
g_touchedPrevFrame[player] = g_touchedThisFrame;
}
public Message(touched, toucher)
{
g_touchedThisFrame = true;
if (g_touchedPrevFrame[toucher])
return;
client_print(toucher, print_chat, "TEst test test"); // testing
}