Currently I am building a plugin which I need to add an action button in order to print a pdf with admin order.


you can use this code to add an action on order edition :

const CUSTOM_ACTION_CODE = "my-plugin__custom-action-code";

add_filter("woocommerce_order_actions", function ($actions) {

    $actions[CUSTOM_ACTION_CODE] = "libel of the custom action";

    return $actions;


add_action("woocommerce_order_action_" . CUSTOM_ACTION_CODE, function (\WC_Order $order) {

    // here the code of the treatement of $order


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