woocommerce order to mark as completed upon visiting a specific page - wordpress

Question

I want a woocommerce order to be automatically marked as completed upon visiting a specific page in WordPress
This specific page will have the order_id in GET variable. Now what i need to know is how to find an order by order_id and mark the status as completed on a specific WordPress page.

Answer 1

You can do it with following piece of code:
if(is_page('page_title')){
$order = new WC_Order($_GET['your_order_id']);
//wc-completed, wc-processing
$update_status = array('ID'=>$_GET['your_order_id'],'post_status'=>'wc-completed');
wp_update_post( $update_status );
}
First check whether It is on your specific page or not.
Second thing is to get your order
Third step is to update status of order.
Let me know if you have any doubt.
EDITED
You can refer codex for more details on is_page.
If you have page_id then you need to put condition like if(is_page(42)) where 42 is ID of your page.

Answer 2

So, Rohil_PHPBeginner's answer works like a charme. If you urgently search for a "just copy and paste" solution and have no time to figure things out, go ahead and use this ready to use snippet for your functions.php:
Don't forget to replace the number 42 with the page id of your desired page that will handle as an order-completion-url. Afterwards you can call the order completion by url by: http://your-url.com/yourdeletionpage/?your_order_id=ORDER_ID_TO_BE_COMPLETED
function my_abhaken() {
if(is_page(42)){
$order = new WC_Order($_GET['your_order_id']);
//wc-completed, wc-processing
$update_status = array('ID'=>$_GET['your_order_id'],'post_status'=>'wc-completed');
wp_update_post( $update_status );
}
}
add_action('wp_head', 'my_abhaken');