Woocommerce Wordpress Adding Images to an Order in Cart - wordpress

Question

Here's the issue: I am trying to add multiple customer uploaded images to a woocommerce product order.
This is what my current function looks like to generate the fields before the add cart button (This displays properly and allows for a customer to select a file from their computer to upload):
function my_special_fields(){
if (get_the_title() == "My Special Product"){
echo '<table>
<tbody>
<tr>
<td>
<input type="file" name="my_image_upload" id="my_image_upload" multiple="false" />
</td>
</tr>
</tbody>
</table>';
}
}
Which I call with the hook:
add_filter('woocommerce_before_add_to_cart_button', 'my_special_fields');
I then use another hook for adding the item data to the cart:
add_action( 'woocommerce_add_cart_item_data', 'save_my_special_fields', 10, 2 );
And the function called with that hook looks like this:
function save_my_special_fields( $cart_item_data, $product_id ) {
// I save a lot of fields in here that are working fine so ignoring those for now
// This is where I try and find my file to upload
if( ! empty( $_FILES ) ) {
foreach( $_FILES as $file ) {
if( is_array( $file ) ) {
$attachment_id = upload_user_file( $file );
}
}
}
}
It calls this piece of code I found for uploading files into wordpress: https://hugh.blog/2014/03/20/wordpress-upload-user-submitted-files-frontend/
function upload_user_file( $file = array() ) {
require_once( ABSPATH . 'wp-admin/includes/admin.php' );
$file_return = wp_handle_upload( $file, array('test_form' => false ) );
if( isset( $file_return['error'] ) || isset( $file_return['upload_error_handler'] ) ) {
return false;
} else {
$filename = $file_return['file'];
$attachment = array(
'post_mime_type' => $file_return['type'],
'post_title' => preg_replace( '/\.[^.]+$/', '', basename( $filename ) ),
'post_content' => '',
'post_status' => 'inherit',
'guid' => $file_return['url']
);
$attachment_id = wp_insert_attachment( $attachment, $file_return['url'] );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attachment_data = wp_generate_attachment_metadata( $attachment_id, $filename );
wp_update_attachment_metadata( $attachment_id, $attachment_data );
if( 0 < intval( $attachment_id ) ) {
return $attachment_id;
}
}
return false;
}
Right now I am not assigning to any post or doing anything with the image other than trying to get it to upload so that as an Admin I can view it in my media folder.
I think the issue is that the woocommerce form for the add to cart fields might not have this encoding:
enctype="multipart/form-data
Any help on implementing this without getting additional woocommerce plugins would be much appreciated.