PHP mailer script error - php

Question

I have an submit page where client scan submit a fillable PDF form along with a photo, using the attached mailer script. The form uploads to the server correctly, however when it is sent to the client, the PDF is blank.
<?php
// did files get sent
if(isset($_FILES) && (bool) $_FILES) {
// define allowed extensions
$allowedExtensions = array("pdf","doc","docx","gif","jpeg","jpg","png","rtf","txt");
$files = array();
// loop through all the files
foreach($_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 YOU HAVE TO DO THIS
$server_file = "/home/castmeb1/public_html/uploads/$path_parts[basename]";
move_uploaded_file($temp_name,$server_file);
// add this file to the array of files
array_push($files,$server_file);
}
// define some mail variables
$to = "castmebg#gmail.com";
$from = "castmebg#gmail.com";
$subject ="test attachment";
$msg = "Please see attached";
$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}\"";
// part 1: 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";
// part 2: 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";
$message .= " name=\"$file\"\n";
$message .= "Content-Disposition: attachment;\n";
$message .= " filename=\"$file\"\n";
$message .= "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
$message .= "--{$mime_boundary}\n";
}
// send the email
$ok = mail($to, $subject, $message, $headers);
if ($ok) {
echo "<p>mail sent to $to!</p>";
} else {
echo "<p>mail could not be sent!</p>";
}
die();
}
?>
Thanks,
JB

Answer 1

if(isset($_FILES) && (bool) $_FILES) {
is an invalid test for a successful upload. The $_FILES array is always set, and assuming a file upload ATTEMPT was made, the array will NEVER be empty.
You should check for errors like this:
if ($_FILES['name_of_file_field']['error'] === UPLOAD_ERR_OK) {
... file was successfully uploaded ...
}
The error codes are defined here: http://php.net/manual/en/features.file-upload.errors.php