它是woocommerce_get_shop_coupon_data 过滤器，示例代码：

add_filter ( \'woocommerce_get_shop_coupon_data\', \'mp_create_coupon\', 10, 2  );
 
function mp_create_coupon( $data, $code ) {
    // Check if the coupon has already been created in the database
    global $wpdb;
    $sql = $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type = \'shop_coupon\' AND post_status = \'publish\' ORDER BY post_date DESC LIMIT 1;", $code );
    $coupon_id = $wpdb->get_var( $sql );
    if ( empty( $coupon_id ) ) {
        // Create a coupon with the properties you need
        $data = array(
            \'discount_type\'              => \'fixed_cart\',
            \'coupon_amount\'              => 100, // value
            \'individual_use\'             => \'no\',
            \'product_ids\'                => array(),
            \'exclude_product_ids\'        => array(),
            \'usage_limit\'                => \'\',
            \'usage_limit_per_user\'       => \'1\',
            \'limit_usage_to_x_items\'     => \'\',
            \'usage_count\'                => \'\',
            \'expiry_date\'                => \'2018-09-01\', // YYYY-MM-DD
            \'free_shipping\'              => \'no\',
            \'product_categories\'         => array(),
            \'exclude_product_categories\' => array(),
            \'exclude_sale_items\'         => \'no\',
            \'minimum_amount\'             => \'\',
            \'maximum_amount\'             => \'\',
            \'customer_email\'             => array()
        );
        // Save the coupon in the database
        $coupon = array(
            \'post_title\' => $code,
            \'post_content\' => \'\',
            \'post_status\' => \'publish\',
            \'post_author\' => 1,
            \'post_type\' => \'shop_coupon\'
        );
        $new_coupon_id = wp_insert_post( $coupon );
        // Write the $data values into postmeta table
        foreach ($data as $key => $value) {
            update_post_meta( $new_coupon_id, $key, $value );
        }
    }
    return $data;
}