title: Woocommerce get order id in order page
body: <p>I try to get the order id in my hook woocommerce_checkout_process in order page but i've no value, these are the method i tried :</p>
  
  <pre><code>add_action('woocommerce_checkout_process', 'is_cumul');
  
  function is_cumul() { 
       print_r(WC()-&gt;order-&gt;id);
  
  
         }
  }
  </code></pre>
  
  <p>Thanks</p>