สอบถามการส่งค่าโดยใช้ link หน่อยครับ แบบ php งงเลยครับ

echo"<td width='200'><font color='#FFFFFF'><a href='main.php?id=".$rs['namegov3']."'>ไปหน้า main</a></td>";

 $id = $_GET["id"];

$sql="select * from ......... where namegov3 like '$id' ";
$objquery=mysql_db_query("$dbname",$sql);
$row=mysql_num_rows($result);
if ($row<>0){
	while ($rs = mysql_fetch_array($objquery))
	{
echo "<table class='SELECT' border='1' bgcolor='#666666' align='center'";
	echo "<tr>";
	echo"<td width='60' align='center'><font color='#FFFFFF'>".$rs['rnx']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov2']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov3']."</td>";
echo "</tr>";
	}
	echo "</table>";
	}
else{
	echo  "ไม่พบข้อมูล";
	}

$sql="select * from ......... where namegov3 like '$id' ";
$objquery=mysql_db_query("$dbname",$sql);
$row=mysql_num_rows($objquery);
if ($row<>0){
	while ($rs = mysql_fetch_array($objquery))
	{
echo "<table class='SELECT' border='1' bgcolor='#666666' align='center'";
	echo "<tr>";
	echo"<td width='60' align='center'><font color='#FFFFFF'>".$rs['rnx']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov2']."</td>";
	echo"<td width='200'><font color='#FFFFFF'>".$rs['namegov3']."</td>";
echo "</tr>";
	}
	echo "</table>";
	}
else{
	echo  "ไม่พบข้อมูล";
	}