สอบถามเรื่่องของ jpgraph หน่อยค่ะ พอดีขึ้นภาษาไทยแค่อันสุดท้ายอ่าค่ะ

<?php  
	include("../JpGraph/src/jpgraph.php");
	include("../JpGraph/src/jpgraph_line.php");

	require_once('../connect/Connect.php');
	if(empty($_POST['subjectid'])&&empty($_POST['id'])){?>
		<script language="javascript">
		alert("ไม่ได้ระบุวิชา"); location.href='Graph1_Select.php';
		</script>

<?  }
	elseif(!empty($_POST['subjectid'])&&!empty($_POST['id'])){?>
		<script language="javascript">
		alert("กรุณาระบุอย่างใดอย่างหนึ่ง"); location.href='Graph1_Select.php';
		</script>
	<?  }
	else{
		if(empty($_POST['subjectid'])){
			$id=$_POST['id'];
			$resultcheck=mysql_query("SELECT * FROM subject WHERE Subject_Id='$id'");
			if(mysql_num_rows($resultcheck)==0){?>
			<script language="javascript">
			alert("ระบุรหัสวิชาไม่ถูกต้อง"); location.href='Graph1_Select.php';
			</script>
		<?	}
		}
		else{
			$id=$_POST['subjectid'];
		}
		
	}
	$resultcheck2=mysql_query("SELECT * FROM reassess WHERE(Subject_Id='$subjectid')");
	if(mysql_num_rows($resultcheck2)==0){?>
		<script language="javascript">
		alert("ไม่พบรายงานการประเมิน"); location.href='Graph1_Select.php';
		</script>
<?	}
	else{
	$g = new Graph(500, 650);
	$g->SetScale("textlin");
	
	
	$resultreassess=mysql_query("SELECT * FROM reassess WHERE Subject_id='$id'");
	$datareassess=mysql_fetch_array($resultreassess);
	$subjectid=$datareassess['Subject_Id'];
	$resultsubject=mysql_query("SELECT * FROM subject WHERE Subject_Id='$subjectid'");
	$datasubject=mysql_fetch_array($resultsubject);
	//แสดงส่วนบน
	$head=$datasubject['Subject_Id']."  วิชา ".$datasubject['Subject_NameThai'];
	$title = iconv("tis620", "utf-8", $head);
	$g->title->Set($title);
	$g->title->SetFont(FF_JASMINE, FS_BOLD, 16);
	$g->title->SetColor("black");
	
	//หารายชื่ออาจารย์	
	$sqlreassess="SELECT DISTINCT(Teacher_Id) FROM reassess WHERE (Subject_Id='$subjectid') ORDER BY Teacher_Id ASC";
	$resultreassess=mysql_query($sqlreassess)or die ("no sqlteacher");
	$numreassess=mysql_num_rows($resultreassess);
	$k=0;
	if(mysql_num_rows($resultreassess)<2){?>
		<script language="javascript">
		alert("ไม่สามารถเปรียบเทียบข้อมูลได้"); location.href='Graph1_Select.php';
		</script>
<?	exit; }

	while($datareassess=mysql_fetch_array($resultreassess)){
		$teachid=$datareassess['Teacher_Id'];
		
		
		$resultteacher=mysql_query("SELECT * FROM teachar WHERE Teacher_Id='$teachid'");
		$datateacher=mysql_fetch_array($resultteacher);
		$labels[$k] =$datateacher['Teacher_Fname']." ".$datateacher['Teacher_Lname'];
		//แสดงชื่อนามสกุลอาจารย์
		for($n=0;$n<$numreassess;$n++){
			//echo "tea : ".$printteacher[$n] ."<br>";	
			//echo "point : ".$printresult[$n]."<br>";
			$labels[$n]=iconv("tis-620", "utf-8", $labels[$n]);
		
		}
		$g->xaxis->SetTickLabels($labels);
		$g->xaxis->SetFont(FF_JASMINE, FS_NORMAL,14);
		$g->xaxis->SetLabelAngle(45);
		//point
		$sqlselect="SELECT * FROM reassess WHERE(Teacher_Id='$teachid')AND(Subject_Id='$subjectid');";
		$resultselect=mysql_query($sqlselect)or die ("no sqlselect");
		$numselect=mysql_num_rows($resultselect);
		//ลบคะแนนทั้งหมดให้เป็น0
		for($clear=0;$clear<30;$clear++){
			$question[$clear]=0;
		}
		while($dataselect=mysql_fetch_array($resultselect)){
			$question[1]=$question[1]+ $dataselect[Ques1];
			$question[2]=$question[2]+ $dataselect[Ques2];
			$question[3]=$question[3]+ $dataselect[Ques3];
			$question[4]=$question[4]+ $dataselect[Ques4];
			$question[5]=$question[5]+ $dataselect[Ques5];
			$question[6]=$question[6]+ $dataselect[Ques6];
			$question[7]=$question[7]+ $dataselect[Ques7];
			$question[8]=$question[8]+ $dataselect[Ques8];
			$question[9]=$question[9]+ $dataselect[Ques9];
			$question[10]=$question[10]+ $dataselect[Ques10];
			$question[11]=$question[11]+ $dataselect[Ques11];
			$question[12]=$question[12]+ $dataselect[Ques12];
			$question[13]=$question[13]+ $dataselect[Ques13];
			$question[14]=$question[14]+ $dataselect[Ques14];
			$question[15]=$question[15]+ $dataselect[Ques15];
			$question[16]=$question[16]+ $dataselect[Ques16];
			$question[17]=$question[17]+ $dataselect[Ques17];
			$question[18]=$question[18]+ $dataselect[Ques18];
			$question[19]=$question[19]+ $dataselect[Ques19];
			$question[20]=$question[20]+ $dataselect[Ques20];
			$question[21]=$question[21]+ $dataselect[Ques21];
			$question[22]=$question[22]+ $dataselect[Ques22];
			$question[23]=$question[23]+ $dataselect[Ques23];
			$question[24]=$question[24]+ $dataselect[Ques24];
			$question[25]=$question[25]+ $dataselect[Ques25];
			$question[26]=$question[26]+ $dataselect[Ques26];
			$question[27]=$question[27]+ $dataselect[Ques27];
			$question[28]=$question[28]+ $dataselect[Ques28];
			$question[29]=$question[29]+ $dataselect[Ques29];
			$question[30]=$question[30]+ $dataselect[Ques30];
		}
		//จำนวนนักศึกษาที่ประเมินสำหรับวิชานั้นๆ
		$numstu=mysql_num_rows($resultselect);
		//นำคะแนนมาคูณจำนวนนักศึกษา
		$point=$numstu*5;
		//คะแนนข้อย่อย
		$sqlsub="SELECT * FROM sub ORDER BY Sub_No ASC";
		$resultsub=mysql_query($sqlsub)or die ("no sqlsub");
		$numsub=mysql_num_rows($resultsub);
		//เคลียร์ค่า
		$resultsumsub=0;
		for($i=1;$i<=$numsub;$i++){
			$resultques[$i]=($question[$i]/$point)*100;
			$resultques[$i]=round($resultques[$i],2);
			$resultsumsub=$resultsumsub+$resultques[$i];	
		}		
		
		$resultsum= $resultsumsub/$numsub;
		$printresult[$k]= round($resultsum,2);
				
	$k++;
	}	
	
	//แสดงคะแนน
	for($n=0;$n<$numreassess;$n++){
		$data[$n]=$printresult[$n];	
	}
	
	$line = new LinePlot($data);
	$line->Setcolor("green");
	$line->value->Show();
	$line->value->SetColor("red");
	$line->mark->SetType(MARK_SQUARE);
	$line->SetLegend("");
	$g->Add($line);
	
	$g->Stroke();
	}
?>
</body>
</html>