การขึ้นหน้าใหม่อัตโนมัติ โดยการใช้ FPDF ทำอย่างไรครับ

	include("library/db_conn.inc.php");
	require("fpdf17/fpdf.php");
	
	$pdf = new FPDF();
	$pdf->SetMargins(25.4,25.4,25.4);
	$pdf->AddPage();
	$pdf->AddFont('THSarabun','','THSarabunNew.php');
	$pdf->AddFont('THSarabun','b','THSarabunNew Bold.php');
	$pdf->AddFont('THSarabun','i','THSarabunNew Italic.php');
	$pdf->AddFont('THSarabun','bi','THSarabunNew BoldItalic.php');	
	
	$pdf->SetFont('THSarabun','b',20);
	$str = iconv("utf-8","tis-620","แบบฟอร์มขอเทียบรายวิชา");
	$pdf->Cell(0,10,$str,0,1,"C");
	
	$value1 = $_SESSION["value"][0];
	$value2 = $_SESSION["value"][1];
	if($value1!="" && $value2!="")
	{
		$sql = "select * from dbo_subject where ReferenceID = '$value1';";
		$query = mysql_query($sql)or die(mysql_error());
		$result = mysql_fetch_assoc($query);
		
		$pdf->SetFont('THSarabun','b',18);
		$str = iconv("utf-8","tis-620","คำอธิบายรายวิชาของสถาบันการศึกษาที่ต้องการเปรียบเทียบ");
		$pdf->Cell(0,9,$str,0,1);
		
		$pdf->SetFont('THSarabun','',16);
		$str = iconv("utf-8","tis-620","                    รายวิชา   ".
						$result["SubjectID"]."   ".
						$result["SubjectName"]
					);
		$pdf->Cell(0,8,$str,0,1);
		$str = iconv("utf-8","tis-620","                    คำอธิบายรายวิชา");
		$pdf->Cell(0,8,$str,0,1);
		$str = iconv("utf-8","tis-620","                    ".$result["Description"]);
		$pdf->Write(8,$str);
		$pdf->Ln(0);
		
		$sql2 = "select * from dbo_subject where ReferenceID = '$value2';";
		$query2 = mysql_query($sql2)or die(mysql_error());
		$result2 = mysql_fetch_assoc($query2);
		
		//$pdf->SetY(131);
		$pdf->SetFont('THSarabun','b',18);
		$str = iconv("utf-8","tis-620","คำอธิบายรายวิชาของมหาวิทยาลัยราชภัฏนครสวรรค์");
		$pdf->Cell(0,9,$str,0,1);
		
		$pdf->SetFont('THSarabun','',16);
		$str = iconv("utf-8","tis-620","                    รายวิชา   ".
						$result2["SubjectID"]."   ".
						$result2["SubjectName"]
					);
		$pdf->Cell(0,8,$str,0,1);
		$str = iconv("utf-8","tis-620","                    คำอธิบายรายวิชา");
		$pdf->Cell(0,8,$str,0,1);
		$str = iconv("utf-8","tis-620","                    ".$result2["Description"]);
		$pdf->Write(8,$str);
		$pdf->Ln(0);

	}
	
	$pdf->SetY(227);
	$pdf->SetFont('THSarabun','b',18);
	$str = iconv("utf-8","tis-620","ความเห็นของผู้ประเมิน");
	$pdf->Cell(0,9,$str,0,1);
	
	$pdf->Image('img/check.jpg',60,239);
	$pdf->SetFont('THSarabun','',16);
	$str = iconv('utf-8','tis-620',"                                 เห็นสมควรเทียบได้");
	$pdf->Cell(80,8,$str,0,0);
	$pdf->Image('img/check.jpg',120,239);
	$str = iconv('utf-8','tis-620',"                 เทียบไม่ได้");
	$pdf->Cell(0,8,$str,0,1);
	$pdf->Ln(8);
	$pdf->SetX(60);
	$str = iconv('utf-8','tis-620',"(ลงชื่อ).........................................................................ผู้ประเมิน");
	$pdf->Cell(0,8,$str,0,1);
	$pdf->SetX(60);
	$str = iconv('utf-8','tis-620',"          (....................................................................)");
	$pdf->Cell(0,8,$str,0,1);
	$pdf->SetX(60);
	$str = iconv('utf-8','tis-620',"หัวหน้าสาขาวิชา.........................................................................");
	$pdf->Cell(0,8,$str,0,1);
	
	unset($_SESSION["value"]);
	
	date_default_timezone_set('Asia/Bangkok');
	$namefile = date("YmdHis");
	ob_clean();
	$pdf->Output($namefile."_pdf.pdf","I");