Trigger woocommerce order email hook from subscription payment

问题

I'd like to hook into the subscription plugin when a new order has been placed which I have done successfully using this action: woocommerce_checkout_subscription_created. Inside the function for that action I want to modify the email that goes out to the customer which I have tried to do like so:

<?php 
    function subscription_created($subscription){   

    add_action('woocommerce_email_before_order_table','my_offer',20);
    $order = $subscription->order;

    function my_offer($order){

        echo "<h2>Your Trial Offer</h2>";
        echo "<p>Your subscription to this product entitles you to a free blah blah blah...</p>";

    }

    return $var;

}
add_action('woocommerce_checkout_subscription_created','subscription_created'); 
?>

Like I said, the action for the created subscription fires (I logged the output for $subscription successfully). The email action isn't working.

I'm guessing this has something to do with scope, but I'm not sure. Any thoughts would be appreciated.

回答1:

Running an action within an action isn't possible, I believe.

If you check the code for this action, you have access to the following:

do_action( 'woocommerce_email_before_order_table', $order, $sent_to_admin, $plain_text, $email );

Therefore, you could perhaps NOT hook into woocommerce_checkout_subscription_created and only use woocommerce_email_before_order_table.

You could then query whether or not the $order is a subscription and then modify the output accordingly.

add_action( 'woocommerce_email_before_order_table', function($order, $sent_to_admin, $plain_text, $email) {
    if ( function_exists( 'wcs_order_contains_subscription' ) ) {
        if ( wcs_order_contains_subscription( $order->ID ) ) {
            // Do what you need to do
        }
    } 
}, 10, 4 );

来源：https://stackoverflow.com/questions/42044353/trigger-woocommerce-order-email-hook-from-subscription-payment

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