title: someone decrypt double bracket (php) notation for me?
body: <pre><code>&lt;?php [[add_menu_page|add_menu_page]]( $page_title, $menu_title, $capability, $menu_slug, $function, $icon_url, $position ); ?&gt; 
  </code></pre>
  
  <p>how does this [[add_menu_page|add_menu_page]] work? and what is the underlying logic? </p>
  
  <p>ref. <a href="http://codex.wordpress.org/Adding_Administration_Menus" rel="nofollow noreferrer">http://codex.wordpress.org/Adding_Administration_Menus</a></p>