// Aufruf der Funktion
  if (!($result = read_tickets($db_where_search, $db_where, $db_show_ticket , $db_sort_ticket_list, $db_sort_direction)) )
	{
		print("Fehler in DB-Funktion");
		return;
	}
	else
	{
	 // hat geklappt
	 ...
	 
	// Der Button springt in die Funktion my() 
   <input type=button value=My OnClick=(<?my();?>)></td>
   
   // Die Funktion my()
   function my()
	{
	  $db_where_search = "user_id";
	  $db_where = 2;
      read_tickets.inc.php.tickets.submit();
	}

// Am anfang der Datei
global $db_where_search, $db_where, $db_show_ticket , $db_sort_ticket_list, $db_sort_direction;
	switch($_GET["suche"])
	{
	  case "my":
		   $db_where_search = "user_id";
			 $db_where = 2;
			 break;
		case "closed":
		  $db_where_search = "working_state";
			$db_where = "'closed";
			break;
		case "open":
		  $db_where_search = "working_state";
			$db_where = "open";
			break;
		default:
		  $db_where_search = "";
			$db_where = "";
	}

//Im HTML-Teil der Seite

 <input type=button value=My OnClick=(location-href='read_tickets.inc.php?suche=my')>