How to attach customer designs to email (Word Press)

    /* PitchPrint Attachments Start*/

    /*
     * Delete files greater than 5 minutes old
     */
    function custom_delete_old_pp_designs($dir)
    {
    	$lifeTime = time() - 300;

    	foreach (glob("$dir/*.pdf") as $file) {
        	if (filemtime($file)  < $lifeTime) unlink($file);
    	}
    }

    /*
     * Saves PitchPrint items design to your server
     */
    function custom_get_pp_pdf($ppPdfBase, $pId, $dest)
    {
    	$file 		= $dest."/MyDesign_".time().'.pdf';
    	$getFile 	= "$ppPdfBase=$pId";

    	$success 	= copy($getFile, $file);

    	if ($success) return $file;
    	return false;
    }

    /*
     * Returns PP Attachments for email
     * And empties folder from old pp designs
     */
    function custom_append_pp_designs($obj)
    {
    	$ppFetchPDFBaseUrl  = 'http://pdf.pitchprint.io?id';
    	$pluginUpldDir 		= get_home_path().'wp-content/plugins/pitchprint/uploader/files';
    	$data 				= [];

    	// Remove old designs from upload dir
    	custom_delete_old_pp_designs($pluginUpldDir);

    	// Fetch all PitchPrint designs in this order
    	foreach ($obj->get_items() as $item_id => $item) {

    		$meta = wc_get_order_item_meta($item_id, '_w2p_set_option');

    		if ($meta) {
                $ppData =  (strpos($meta,'%7') !== FALSE) ? json_decode(urldecode($meta)) : json_decode($meta);

                if ( isset($ppData->files) ) {

                 	foreach ($ppData->files as $file) {

                        $regex = "/http.*?uploader\/files/";

    				    $result = preg_replace($regex, $pluginUpldDir, $file);

                        $data[] = $result;

                    }

                } else {
    				$pId 	= $ppData->projectId;
    				$data[] = custom_get_pp_pdf($ppFetchPDFBaseUrl, $pId, $pluginUpldDir);
                }
    		}

    	}

    	// Return attachments
    	return $data;
    }

    function attach_pitchprint_designs_pdf_to_email ( $attachments , $id, $object, $new ) {
    	return custom_append_pp_designs($object);
    }

    add_action( 'check_pitchprint_item_need_attach', 'custom_attach_pitchprint_designs');

    /*
     * Check whether we need to append the attachments.
     */
    function custom_attach_pitchprint_designs($obj)
    {
    	foreach ($obj->get_items() as $item_id => $item) {

    		$meta = wc_get_order_item_meta($item_id, '_w2p_set_option');

    		if ($meta) {

    			add_filter( 'woocommerce_email_attachments', 'attach_pitchprint_designs_pdf_to_email',10, 4);

    			return true;
    		}
    	}
    }

    do_action('check_pitchprint_item_need_attach', $order);

    /* PitchPrint Attachments End*/