woocommerce-create-new-order.php

<?php
/*
 * Create order dynamically
 */
add_action( 'woocommerce_before_checkout_form', 'create_order' );

function create_order() {
	
	global $woocommerce;
	
	$address = array(
		'first_name' => 'Firstname',
		'last_name'  => 'Lastname',
		'company'    => 'Company',
		'email'      => 'emailaddress@nope.com',
		'phone'      => '012-345-6789',
		'address_1'  => 'Address line 1',
		'address_2'  => 'Address line 2',
		'city'       => 'City',
		'state'      => 'State',
		'postcode'   => '00000',
		'country'    => 'Country'
	);
	
	// Now we create the order
	$order = wc_create_order();
	
  	// Use the product IDs to add
	$order->add_product( get_product( 123 ), 1); 
	
	// Set addresses
	$order->set_address( $address, 'billing' );
	$order->set_address( $address, 'shipping' );
	
	// Set payment gateway
	$payment_gateways = WC()->payment_gateways->payment_gateways();
	$order->set_payment_method( $payment_gateways['bacs'] );
	
	// Calculate totals
	$order->calculate_totals();
	$order->update_status( 'Processing', 'Order created via Pick-A-Display - ', TRUE);
}