title: How do I comment out multiple lines with HTML and PHP code in it?
body: <p>I want to comment out the whole code below. What would be the easiest way to do it without using multiple comments? Thanks in advance.</p>
  
  <pre><code>&lt;nav id="site-navigation" class="main-navigation" role="navigation"&gt;
      &lt;h3 class="menu-toggle"&gt;&lt;?php _e( 'Menu', 'twentytwelve' ); ?&gt;&lt;/h3&gt;
      &lt;a class="assistive-text" href="#content" title="&lt;?php esc_attr_e( 'Skip to content', 'twentytwelve' ); ?&gt;"&gt;&lt;?php _e( 'Skip to content', 'twentytwelve' ); ?&gt;&lt;/a&gt;
      &lt;?php wp_nav_menu( array( 'theme_location' =&gt; 'primary', 'menu_class' =&gt; 'nav-menu' ) ); ?&gt;
  &lt;/nav&gt;&lt;!-- #site-navigation --&gt;
  </code></pre>