How to correct determinate path varible in path
<p>Suppose I have site  <code>www.mydomain.com</code> and it has this type of path:</p>

<p><code>www.mydomain.com/order/123</code> where 123 is order id.</p>

<p>I want to add to this paths path few variables? For example it can be <code>?a=1&amp;b=2</code> or <code>?a=1&amp;b=2&amp;c=cat</code></p>

<p>How to correct build path:</p>

<ul>
<li><code>www.mydomain.com/order/123?a=17&amp;b=3</code></li>
<li><code>www.mydomain.com/order/123/?a=17&amp;b=3</code></li>
<li><code>www.mydomain.com/order?id=123&amp;a=17&amp;b=3</code></li>
</ul>