I know why nobody can use the functions connection_XXX(). If the php code do not send anything to buffer, the php dont check the connection, so, the connection_timeout will still NORMAL and will not be ABORTED.
Ex
<?php
Set_Time_Limit(0); //this you know what gonna do
Ignore_User_Abort(True); //this will force the script running at the end
While(!Connection_Aborted()) {
Echo "\n"; //this will save de while
Flush(); //Now php will check de connection
While(CONDITION) {
Echo "My chat....";
}
Sleep(1);
}
?>
end