woocommerce_thankyou hook not working

问题:

When I paste the code below directly into the thankyou.php, it works perfectly fine. but when I try to hook it into woocommerce_thankyou, nothing happens.

I'm just getting started with PHP,

add_action('woocommerce_thankyou', 'test_1', 10, 1);

function test_1() {
    $paymethod = $order->payment_method_title;
    $orderstat = $order->get_status();

    if (($orderstat == 'completed') && ($paymethod == 'PayPal')) {
        echo "something";
    } elseif (($orderstat == 'processing') && ($paymethod == 'PayPal')) {
        echo "some other shit";
    } elseif (($orderstat == 'pending') && ($paymethod == 'PayPal')) {
        echo "some other shit";
    }
}

回答1:

First of all you have to add the function and hook in functions.php file of your active child theme (or theme). Or also in any plugin PHP files. Secondly you need to create an instance/object of order, to access the data.

add_action('woocommerce_thankyou', 'wh_test_1', 10, 1);

function wh_test_1($order_id) { //<--check this line

    //create an order instance
    $order = wc_get_order($order_id); //<--check this line

    $paymethod = $order->payment_method_title;
    $orderstat = $order->get_status();

    if (($orderstat == 'completed') && ($paymethod == 'PayPal')) {
        echo "something";
    } 
    elseif (($orderstat == 'processing') && ($paymethod == 'PayPal')) {

        echo "some other shit";
    } 
    elseif (($orderstat == 'pending') && ($paymethod == 'PayPal')) {
        echo "some other shit";
    }
}

Hope this helps!