multiple files as attachment from a form and send a email - php

Question

Following is the code I am using to send multiple files as attachment in a mail, tested it in local environment, the attachments were reaching the mail box but as empty files, and in live environment, result is mail could not be sent, though files get saved in the upload folder on the server...a newbie in php so please can anyone help what am I doing wrong..??
In local environment i was using this code $server_file = "/localhost:81/xyz/uploads/$path_parts[basename]"; in place what is mentioned down there under move this file to the server
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
//did files get sent
if(isset($_FILES) && (bool) $_FILES) {
//define allowed extensions
$allowedExtensions = array("pdf","doc","docx","gif","jpeg","jpg","png","rtf","txt");
$files = array();
$username=$_POST['username'];
$email=$_POST['email'];
//loop through all the files
foreach($_FILES as $name=>$file){
//define some variables
$file_name= $file['name'];
$temp_name= $file['tmp_name'];
//check if this file type is allowed
$path_parts = pathinfo($file_name);
$ext = $path_parts['extension'];
if(!in_array($ext,$allowedExtensions)) {
die("extension not allowed");
}
//move this file to the server
$server_file = "/home/public_html/xyz.com/uploads/$path_parts[basename]";
move_uploaded_file($temp_name,$server_file);
//add this file to array of files
array_push($files,$server_file);
}
//define some mail variables
$to = "info#xyz.com";
$from = "From: $username<$email>\r\nReturn-path: $email";
$subject = "Photo attachment of . $name .";
$msg = "Images of $username, $email";
$headers = "From: $from";
//define our boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
//tell the header about the boundary
$headers .= "nMIME-Version:1.0\n";
$headers .= "Content-Type: multipart/mixed;\n";
$headers .= " boundary=\"{$mime_boundary}\"";
//part1: define the plain text email
$message = "\n\n--{$mime_boundary}\n";
$message .="Content-Type: text/plain; charset=\"iso-8859-1\"\n";
$message .="Content-Transfer-Encoding: 7bit\n\n". $msg ."\n\n";
$message .="--{$mime_boundary}\n";
//part2: loop and define mail attachments
foreach($files as $file){
$aFile = fopen($file,"rb");
$data = fread($aFile,filesize($file));
fclose($aFile);
$data = chunk_split(base64_encode($data));
$message .="Content-Type: {\"application/octet-stream\"};\n";
$message .= " name=\"$files\"\n";
$message .= "Content-Disposition: attachment;\n";
$message .= " filename=\"$files\"\n";
$message .= "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
$message .= "--{$mime_boundary}\n";
}
//send the email
$ok = mail($to, $subject, $message, $headers, $from);
if($ok){
header("Location: thank-your.php");
}
else{
echo"<p>mail could not be sent!</p>";
}
die();
}
?>