rate topic statues image code help me

[matrikation]

hello

 

i am using invision power board v 2.2.1 i want to add statues image for topic rates like this :

 

 

so i already made this code below but when i lanuch it for example :

 

http://localhost/f/rate.php?id=3

i see blank page no pic for display i don't know why

<?php
if ($_GET['id'] == "rating_tid") {
header("content-type: image/png");


$db_host = "localhost";
$db_user = "root";
$db_pass = "654321";
$db_name = "1";
$db = mysql_connect($db_host,$db_user,$db_pass);
mysql_select_db ($db_name) or die ("Cannot connect to database");

$result = mysql_fetch_assoc("SELECT `rating_tid`, `rating_value` FROM ibf_topic_ratings");

$rating = $result['rating_value'];



$image = @imagecreatefrompng("rate.png");
$black = imagecolorallocate($image, 0, 0, 0);
// Res $Img, rgb red, rgb green, rgb blue. Let's do white too.
$white = imagecolorallocate($image, 255, 255, 255);


@imagestring($image, 2, 185, 41, "Rating", $black);
@imagestring($image, 1, 154, 55,  $rating , $black);


imagepng($image);
// let's destroy it now. DIE!
imagedestroy($image);
// Finally, close mySql.
mysql_close();
} 
?>

 

i worry about this code :

 

<?php
if ($_GET['id'] == "rating_tid") {
header("content-type: image/png");

 

i think there would be specify some rows from dataebase in code like

 

if(mysql_num_rows($result)==1)
		{
		$name=mysql_result($result, 0, 0);

 

anyone can help me i will be glad