อยากรู้วิธีเรียกใช้ fuction เพื่อแสดงชื่อ จากคีย์ ########%%%%%%%%%%%%%

	function getSationName( $station_id ){
		$re = mysql_query(" select station_name from tb_station where station_id = ".$station_id." ");
		$rs = mysql_fetch_assoc( $re );
		return  $rs['station_name'];	
	}

    function getResults($to) { 
        $ourShortestPath = array(); 
        $foo = ''; 
        for ($i = 0; $i < $this -> numberOfNodes; $i++) { 
            if($to !== null && $to !== $i) { 
                continue; 
            } 
            $ourShortestPath[$i] = array(); 
            $endNode = null; 
            $currNode = $i; 
            $ourShortestPath[$i][] = $i; 
            while ($endNode === null || $endNode != $this -> startnode) { 
                $ourShortestPath[$i][] = $this -> previousNode[$currNode]; 
                $endNode = $this -> previousNode[$currNode]; 
                $currNode = $this -> previousNode[$currNode]; 
            } 
            $ourShortestPath[$i] = array_reverse($ourShortestPath[$i]); 
            if ($to === null || $to === $i) { 
            if($this -> distance[$i] >= $this -> infiniteDistance) { 
                $foo .= sprintf("no route from %d to %d. \n",$this -> startnode,$i); 
            } else { 
                $foo .= sprintf(' ต้นทาง %d => ปลายทาง  %d = %d (กิโลเมตร) <br> destinations [%d]: Follow the route to the classes (%s).'."\n" , 
                        $this -> startnode,$i,$this -> distance[$i], 
                        count($ourShortestPath[$i]), 
                        implode('-',$ourShortestPath[$i])); 
            } 
            $foo .= str_repeat('-',20) . "\n"; 
                if ($to === $i) { 
                    break; 
                } 
            } 
        } 
        return $foo; 
    } 
} // end class