สอบถามครับ ทำไมเวลาอัพรูป บางรูปอัพได้ บางรูปอัพไม่ได้ อัพ รูปจากมือถือได้ อัพจากคอมบางรูปได้บางรูปไม่ได้ และอยากให้กำหนดได้ว่า นามสกุลไหนอัพ ได้บ้าง รบกวนด้วยครับ

<?php
require("PHPMailer_v5/class.phpmailer.php");
//get data nedeed !
$from = $_POST[from];//จาก
$to = $_POST[to];//ถึง
$subject = $_POST[subject];//หัวข้อ
$message = $_POST[message];//ข้อความที่ต้องการส่ง
//replace \n with <br>
$message = str_replace("\n", "<br>",$message);
//report
echo "<b><font color=#8080FF> From: $from </b><br>";
echo "<b>To: $to </b><br>";
echo "<b>Subject: $subject</b><br><br></font>";
// Obtain file upload variables
$fileatt = $_FILES['fileatt']['tmp_name'];
$fileatt_type = $_FILES['fileatt']['type'];
$fileatt_name = $_FILES['fileatt']['name'];

$headers = "From: $from \n";


// if($_FILES['fileatt']['size'] > 0)
if (is_uploaded_file($fileatt)) {
// Read the file to be attached ('rb' = read binary)
$file = fopen($fileatt,'rb');
$data = fread($file,filesize($fileatt));
fclose($file);
// Generate a boundary string
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// Add the headers for a file attachment
$headers .= "MIME-Version: 1.0\n" .
"Content-Type: multipart/mixed;\n" .
" boundary=\"{$mime_boundary}\"";
// Add a multipart boundary above the message
$message = "This is a multi-part message in MIME format.\n\n" .
"--{$mime_boundary}\n" .
"Content-Type: text/html; charset=\"UTF-8\"\n" .
"Content-Transfer-Encoding: 7bit\n\n" .
$message . "\n\n";

// Base64 encode the file data
$data = chunk_split(base64_encode($data));
// Add file attachment to the message
$message .= "--{$mime_boundary}\n" .
"Content-Type: {$fileatt_type};\n" .
" name=\"{$fileatt_name}\"\n" .
//"Content-Disposition: attachment;\n" .
//" filename=\"{$fileatt_name}\"\n" .
"Content-Transfer-Encoding: base64\n\n" .
$data . "\n\n" .
"--{$mime_boundary}--\n";
}else echo "File error! ";


$charset='UTF-8';
$encoded_subject="=?$charset?B?".base64_encode($subject)."?=\n";

//send the mail
if(mail($to, $encoded_subject, $message,$headers))echo "<b><font color=#FF0000>Message was send!<b></font>";
else echo "<b><font color=#FF0000>Message error!<b></font>";

?>