Action Hooks Reference

Challan – WooCommerce pdf invoices & packing slips includes several actions & filter hooks where you can output order meta, product meta, or custom content. Below is the list of available action and filter hooks:

Action Hooks

Action Hooks	Position	Arguments
woo_invoice_custom_style	Add CSS Style to Invoice	$template (invoice or packing_slip)
woo_invoice_before_document	The header of the Invoice template	$order, $template (invoice or packing_slip)
woo_invoice_after_document	Footer of the Invoice template	$order, $template (invoice or packing_slip)
woo_invoice_after_document_label	After Invoice Title at the header	$order, $template (invoice or packing_slip)
woo_invoice_before_billing_address	Before Billing or Shipping Address	$order, $template (invoice or packing_slip)
woo_invoice_after_billing_address	After Billing or Shipping Address	$order, $template (invoice or packing_slip)
woo_invoice_before_order_data	Before order details	$order, $template (invoice or packing_slip)
woo_invoice_after_order_data	After order details	$order, $template (invoice or packing_slip)
woo_invoice_before_product_list	Before the product list table	$order, $template (invoice or packing_slip)
woo_invoice_after_product_list	After the product list table	$order, $template (invoice or packing_slip)
woo_invoice_before_item_meta	Before Product info	$product, $order, $template (invoice or packing_slip)
woo_invoice_after_item_meta	After Product info	$product, $order, $template (invoice or packing_slip)
woo_invoice_before_customer_notes	Before order note	$order, $template (invoice or packing_slip)
woo_invoice_after_customer_notes	After order note	$order, $template (invoice or packing_slip)

Filter Hooks

Filter Hooks	Arguments
woo_invoice_email_types	$email_types
woo_invoice_mpdf_settings	$mdpf_settings
woo_invoice_file_name	$filename, $template, $order_no
woo_invoice_pdf_font_data	$font_data, $template
woo_invoice_paper_size	$paper_size, $template
woo_invoice_store_logo	$logo_url
woo_invoice_seller_info	$seller_address, $template
woo_invoice_billing_info	$buyer_address, $order, $template
woo_invoice_shipping_info	$shipping_address, $order, $template
woo_invoice_order_data	$order_info, $template, $order_object
woo_invoice_order_number	$order_number, $template, $order_object
woo_invoice_order_date	$order_date, $template, $order_object
woo_invoice_invoice_number	$invoice_number, $template, $order_object
woo_invoice_product_data	$products, $template, $order_object
woo_invoice_order_total	$totals, $template, $order_object
woo_invoice_paid_stamp	$paid_stamp_url
woo_invoice_customer_notes	$customer_note, $template, $order_object
woo_invoice_footer_1	$content, $template, $order_object
woo_invoice_footer_2	$content, $template, $order_object

Example 1: Add order meta to order details section

add_action( 'woo_invoice_after_order_data', 'woo_invoice_delivery_date', 10, 2 );
function woo_invoice_delivery_date ($order,$template_type) {
    if ($template_type == 'invoice') {
        // get the delivery date from the order
        $delivery_date = $order->get_meta('delivery_date');
        // convert date according to WooCommerce/WordPress date format settings)
        $formatted_delivery_date = date_i18n( wc_date_format(), $delivery_date );
        ?>
        <span>Delivery Date: <?php echo $formatted_delivery_date; ?></span>
	<?php
    }
}

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