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Sending multiple attachment in an email using PHP

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I have problem sending an email with multiple attachments. Here is the code:

<?php

    if(isset($_POST['sendEmail']))
    {

        foreach($_FILES['uploadEmail']['error'] as $key=>$value){
            if(!$_FILES['uploadEmail']['error'][$key]){
                $target_path = "";
                $target_path = $target_path . basename( $_FILES['uploadEmail']['name'][$key]); 
                if(move_uploaded_file($_FILES['uploadEmail']['tmp_name'][$key], $target_path)){
                    $files[] = $_FILES['uploadEmail']['name'][$key];
                }
            }
        }

        $toEmails = explode(",",$_POST['toEmail']);
        $count = count($toEmails);
        $i = 0;    $j = 1;    $k = 100;
        $bcc = '';
        while($i<$count){
            $bcc .= $toEmails[$i].",";
            if($j==$k || $i==$count-1){
                $j=1;
                //echo $bcc.'<br />'.$sub.'<br />'.$message.'<br /><br />';
                $from = '[email protected]';
                $sub = $_POST['subject'];
                $message = $_POST['message'];

                /////////////////////////
                $headers = 'From:'. $from . "\r\n";
                $headers .= "Bcc:". $bcc . "\r\n";


                // boundary 
                $semi_rand = md5(time()); 
                $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 

                // headers for attachment 
                $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\""; 

                // multipart boundary 
                $message = "This is a multi-part message in MIME format.\n\n" . "--{$mime_boundary}\n" . "Content-Type: text/html; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n"; 
                $message .= "--{$mime_boundary}\n";

                // preparing attachments
                for($x=0;$x<count($files);$x++){
                    $file = fopen($files[$x],"rb");
                    //echo "<br>".filesize($files[$x]);
                    $data = fread($file,filesize($files[$x]));
                    fclose($file);
                    $data = chunk_split(base64_encode($data));
                    $message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" . 
                    "Content-Disposition: attachment;\n" . " filename=\"$files[$x]\"\n" . 
                    "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
                    $message .= "--{$mime_boundary}\n";
                }

                    // send
                    /////////////////////////

                mail('',$sub,$message,$headers);
                $bcc = '';
            }else{
                $j++;
            }
            $i++;
        }
    }
?>
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>

<script src="http://js.nicedit.com/nicEdit-latest.js" type="text/javascript"></script>
<script type="text/javascript">bkLib.onDomLoaded(function() {
        new nicEditor().panelInstance('message');
       // new nicEditor({fullPanel : true}).panelInstance('area2');
  });</script>
</head>
<body>
<form method="POST" enctype="multipart/form-data">
    <table>
        <tr><td><label for="toEmail">Send To : </label></td><td><textarea id="toEmail" name="toEmail" cols="100" rows="10"></textarea></td></tr>
        <tr><td><label for="subject">Subject : </label></td><td><input type="text" name="subject" id="subject" size="98"></td></tr>
        <tr><td><label for="toEmail">Message : </label></td><td><textarea id="message" name="message" cols="100" rows="10"></textarea></td></tr>
        <tr><td><label for="upload[]">Attachments:</label></td><td></td></tr>
        <tr><td><label>1</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>2</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>3</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>4</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>5</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>6</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>7</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>8</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>9</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td><label>10</label></td><td><input type="file" name="uploadEmail[]"></td></tr>
        <tr><td colspan="2" align="center"><input type="submit" value="Send Email" name="sendEmail" id="sendEmail"></td></tr>
    </table>
</form>
<body>
</html>

I received mail but could not find any attachments with it. Does anyone know what could be wrong?

Here is an email body which I got in mail:

MIME-Version: 1.0 Content-Type: multipart/mixed; 
boundary="==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x"

This is a multi-part message in MIME format.

--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

ds fsdfsdfsdfsdfsdfsdfsf sffdfsdfsdfs fsdfdf sdf s

--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: {"application/octet-stream"};  name="/tmp/phpHFTvAw"
Content-Disposition: attachment;  filename="Lighthouse.jpg"
Content-Transfer-Encoding: base64




--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x Content-Type: {"application/octet-stream"};  name="/tmp/phpyX67HR"
Content-Disposition: attachment;  filename="Penguins.jpg"
Content-Transfer-Encoding: base64




--==Multipart_Boundary_x2d454346f03d2c19cfefc838ce4d8623x

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