How to capture GET argument on static page

Question

So, I want to add some dynamic properties to my static page.

Url of my page is mysite.com/pagename, so I've created template static-pagename.php.

I'd like to capture get argument if I go to my page by this url mysite.com/pagename?var=test.

I have tried with $_GET['var'] and get_query_var('var', 'novar'); but it doesn't work. I'm assuming that wordpress is overriding / rewriting those values, but I'm not sure how to fix that.

Answer 1

Ok. Figured it out. I had to register new query variable in my functions.php.

add_filter('query_vars', 'register_qvs' );

function register_qvs( $qvars ) {
    $qvars[] = 'my_new_var_name';
    return $qvars;
}