ต้องการแสดงข้อมูล URL ใน datebase ลงใน file_get_contents('__URL__'); จะต้องประกาศตัวแปรหรือมีวิธีทำอย่างไรบ้างครับ

$objConnect = mysql_connect("localhost","root","") or die("Error Connect to Database");
$objDB = mysql_select_db("decc2");
mysql_query("SET NAMES utf8", $objConnect);
$strSQL = "SELECT * FROM t_student WHERE classroom_id = '".$_GET['classroom_id']."' ORDER BY student_id desc";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$Num_Rows = mysql_num_rows($objQuery);
				
$i = 1;
while($objResult = mysql_fetch_array($objQuery))
{
	?>
	<?php
	$objConnect2 = mysql_connect("localhost","root","") or die("Error Connect to Database");
	$objDB2 = mysql_select_db("decc2");
	mysql_query("SET NAMES utf8", $objConnect2);
	$strSQL2 = "SELECT * FROM t_classroom WHERE classroom_id = '".$objResult['classroom_id']."'";
	$objQuery2 = mysql_query($strSQL2) or die ("Error Query [".$strSQL2."]");
	$Num_Rows2 = mysql_num_rows($objQuery2);
				
	while($objResult2 = mysql_fetch_array($objQuery2))
{
?>
	<?php
	$objConnect3 = mysql_connect("localhost","root","") or die("Error Connect to Database");
	$objDB3 = mysql_select_db("decc2");
	mysql_query("SET NAMES utf8", $objConnect3);
	$strSQL3 = "SELECT * FROM t_subject WHERE subject_id = '".$_GET['subject_id']."'";
	$objQuery3 = mysql_query($strSQL3) or die ("Error Query [".$strSQL3."]");
	$Num_Rows3 = mysql_num_rows($objQuery3);
				
	while($objResult3 = mysql_fetch_array($objQuery3))
{
?>
	<?php
				
	$objConnect4 = mysql_connect("localhost","root","") or die("Error Connect to Database");
	$objDB4 = mysql_select_db("decc2");
	mysql_query("SET NAMES utf8", $objConnect4);
	$strSQL4 = "SELECT * FROM t_hw WHERE hw_id = 10";
	$objQuery4 = mysql_query($strSQL4) or die ("Error Query [".$strSQL4."]");
	$Num_Rows4 = mysql_num_rows($objQuery4);
				
	while($objResult4 = mysql_fetch_array($objQuery4))
{
				$student_parent_lineid = $objResult['student_parent_lineid'];
				$student_prefix = $objResult['student_prefix'];
				$student_fname = $objResult['student_fname'];
				$student_lname = $objResult['student_lname'];
				$classroom_line = $objResult2['classroom_line'];
				$subject_name = $objResult3['subject_name'];
				$hw_name = $objResult4['hw_name'];
				
	$response = file_get_contents('$student_parent_lineid;');
?>

<?php
}}}}
?>