WooCommerce Order Creation + Updating

woocommerce-order-stuff.php

<?php

// this is the current id of an order in test env
$id = 44;
$order = wc_get_order($id);

/** OR **/

// create a new order like so
$address = array(
    'first_name' => 'Dick',
    'last_name'  => 'Fiddler',
    'company'    => 'WooThemes',
    'email'      => '[email protected]',
    'phone'      => '777-777-777-777',
    'address_1'  => '23 Wiggely Point',
    'address_2'  => '',
    'city'       => 'Mianus',
    'state'      => 'CT',
    'postcode'   => '12345',
    'country'    => 'US'
);
$order = wc_create_order();
$order->set_address($address, 'billing');
$order->set_address($address, 'shipping');

// add fee to order
$name = 'my fee';
$amount = 6.5;
$fee = (object)array(
    'name' => $name,
    'amount' => $amount,
    'tax_data' => array() // gets rid of "Warning: array_map(): Argument #2 should be an array"
);
$order->add_fee($fee);
$order->calculate_totals(); // updates order total

// this is the current id of a product in test env
$product_id = 7;
$product = wc_get_product($product_id);

// add product to order at specified price
$quantity = 1; // default
$price = 19.99;
$args = array(
    'totals' => array(
        'subtotal' => $price,
        'total' => $price
    )
);
$order->add_product($product, $quantity, $args);
$order->calculate_totals(); // updates order total