Adding Custom shortcode value in PDF voucher

.php

function woo_vou_pdf_template_replace_shortcodes( $voucher_template_html, $orderid, $item_key, $items, $voucodes, $productid ) {

  	$prefix = WOO_VOU_META_PREFIX;
    $woo_order = wc_get_order( $orderid );

    // Check if order exists
    if ( ! $woo_order ) {
        return $voucher_template_html;
    }

    // Get order item
    $order_item = $woo_order->get_item( $item_key );

    // Check if order item exists
    if ( ! $order_item ) {
        return $voucher_template_html;
    }

    // Get recipient from name
     $recipient_from_name = $order_item->get_meta( $prefix.WOO_VOU_CSTM_RECIPIENT_FIELD );

    // Check if recipient from name exists
    if ( $recipient_from_name ) {
        // Access the 'value' key in the meta data
        $recipient_from_name_value = isset( $recipient_from_name['value'] ) ? $recipient_from_name['value'] : '';

        // Replace the placeholder in the template with the recipient from name
        $voucher_template_html = str_replace( '{recipient_from_name}', $recipient_from_name_value, $voucher_template_html );
    }

    return $voucher_template_html;
}

// Add filter to replace voucher template shortcodes in download pdf
add_filter('woo_vou_pdf_template_inner_html', 'woo_vou_pdf_template_replace_shortcodes', 10, 6 );