Woocommerce hook after creating order? [closed]

I am looking for a hook which will be triggered after someone submit checkout form and order placed ( no matter he made the payment or not ) .

I tried woocommerce_new_order

But it’s not working.

Try woocommerce_thankyou hook. This will trigger after recieving order successfully, no matter how user made payment.

$hook_to = 'woocommerce_thankyou';
$what_to_hook = 'wl8OrderPlacedTriggerSomething';
$prioriy = 111;
$num_of_arg = 1;    
add_action($hook_to, $what_to_hook, $prioriy, $num_of_arg);

function wl8OrderPlacedTriggerSomething($order_id){
      //do something...
}

For more reference dig into woocommerce/templates/checkout/thankyou.php