รบกวนถามเรื่องการเขียน code ส่งเมล์โดย Attach ครับของผม Attach รูปไปแต่ข้อความไม่ไปครับ

$id_order=$_POST["id_order"];
	$po_num=$_POST["po_num"];
	$name=$_POST["cus_name"];
	$email=$_POST["cus_email"];
	$company=$_POST["cus_compamy"];
	$address=$_POST["cus_address"];
	$country=$_POST["country"];
	$province=$_POST["province"];
	$tel=$_POST["cus_tel"];
	$date_tranfer=$_POST["startdate"];
	$time=$_POST["time"];
	$amount=$_POST["amount"];
	$bank=$_POST["bank"];
	$fileupload=$_FILES['file']['tmp_name'];
	$fileupload_name=$_FILES['file']['name'];
	$fileupload_size=$_FILES['file']['size'];
	$fileupload_type=$_FILES['file']['type'];
	
	$amountshow=number_format($amount,"2");
	
	$date_order=date("Y-m-d");
	
	if ($fileupload) {
		$array_last=explode(".",$fileupload_name);
		$c=count($array_last) -1;
		$lastname=strtolower($array_last[$c]);
		
		if ($lastname=="gif" or $lastname=="jpg" or $lastname=="jpeg" or $lastname=="png") {
			
			$imagename=$po_num.".".$lastname;
			
			if ($lastname =="jpg" or $lastname =="jpeg") {
				$image_resize = imagecreatefromjpeg($fileupload);
			} else if ($lastname =="png") {
				$image_resize = imagecreatefrompng($fileupload);
			} else if ($lastname =="gif") {
				$image_resize = imagecreatefromgif($fileupload);
			}
			$image_size=getimagesize($fileupload);
			$image_w=$image_size[0];
			$image_h=$image_size[1];
			
			if ($image_w > 800) {
				$new_w = 800;
				$new_h = round(($new_w/$image_w)*$image_h);
				$new_image = imagecreatetruecolor($new_w,$new_h);
				imagecopyresized($new_image, $image_resize,0,0,0,0,$new_w,$new_h,$image_w,$image_h);
				if ($lastname =="jpg" or $lastname =="jpeg") {
					imagejpeg($new_image,"administrator/slip/$imagename");
				} else if ($lastname =="png") {
					imagepng($new_image,"administrator/slip/$imagename");
				} else if ($lastname =="gif") {
					imagegif($new_image,"administrator/slip/$imagename");
				}
				imagedestroy($image_resize);
				imagedestroy($new_image);
			} else if ($image_w <= 800) {
				$new_w = $image_w;
				$new_h = round(($new_w/$image_w)*$image_h);
				$new_image = imagecreatetruecolor($new_w,$new_h);
				imagecopyresized($new_image, $image_resize,0,0,0,0,$new_w,$new_h,$image_w,$image_h);
				if ($lastname =="jpg" or $lastname =="jpeg") {
					imagejpeg($new_image,"administrator/slip/$imagename");
				} else if ($lastname =="png") {
					imagepng($new_image,"administrator/slip/$imagename");
				} else if ($lastname =="gif") {
					imagegif($new_image,"administrator/slip/$imagename");
				}
				imagedestroy($image_resize);
				imagedestroy($new_image);
			}
		}
		
	}
	$strSid = md5(uniqid(time()));
	$pathname="administrator/slip";
	$strMessage = "My Body & <b>My Description</b>";

			$strTo = "[email protected]";
			$strSubject = "Inform Payment Transfer PO. Number : $po_num";
			$strHeader .= "MIME-Version: 1.0\n";
			$strHeader .= "Content-Type: multipart/mixed; boundary=\"".$strSid."\"\n\n";
			$strHeader .= "This is a multi-part message in MIME format.\n";
			$strHeader .= "--".$strSid."\n";
			$strHeader .= "Content-type: text/html; charset=utf-8<br>"; // or UTF-8 //
			$strHeader .= "From: $email";
			$strMessage = "";
			$strMessage .= "<br>";
			$strMessage .= "Customer Name : $name<br>";
			$strMessage .= "From : $company<br>";
			$strMessage .= "I'm transfer money to www.hydraulic-smm.com <br>";
			$strMessage .= "PO. Number : $po_num <br>";
			$strMessage .= "Transfer Date : $date_transfer <br>";
			$strMessage .= "Transfer Time : $time <br>";
			$strMessage .= "From Bank : $bank <br>";
			$strMessage .= "Amount Transfer : $amountshow THB <br>";					
			$strMessage .= "Please check the transfer. <br>";
			$strMessage .= "Thank you very much <br>";
			$strMessage .= "<br>";
			$strMessage .= "Best regards<br>";
			$strMessage .= "$name<br>";
			$strMessage .= "$company<br>";
			$strMessage .= "$address<br>";
			$strMessage .= "$province<br>";
			$strMessage .= "$country<br>";
			$strMessage .= "$tel <br>";
			$strMessage .= "$email<br>";
			
			$strContent = chunk_split(base64_encode(file_get_contents($pathname."/".$imagename)));
			$strHeader .= "--".$strSid."\n";
			$strHeader .= "Content-Type: application/octet-stream; name=\"".$imagename."\"\n";
			$strHeader .= "Content-Transfer-Encoding: base64\n";
			$strHeader .= "Content-Disposition: attachment; filename=\"".$imagename."\"\n\n";
			$strHeader .= $strContent."\n\n";	
			$flgSend = mail($strTo,$strSubject,$strMessage,$strHeader);

			
			header( "Location: alertorder.php?alert=complete" );

?>