title: Multiple tag id in post loop
body: <p>How can i add Multiple tag in WP_Query(). So, I have three tags :</p>
  
  <ol>
  <li>first name (tag id="10")</li>
  <li>Middle name (tag id="20")</li>
  <li><p>Last name (tag id="30")</p>
  
  <pre><code>$args = array( 
   'post_type' =&gt; 'post',
      'paged'=&gt;$paged,
      'posts_per_page' =&gt; 15,             
      'orderby' =&gt; 'date',
      **'tag_id' =&gt;  array(10,20,30),**           
      'order' =&gt; 'DESC'
      );
  </code></pre></li>
  </ol>
  
  <p>Of course above does not work.</p>
  
  <p>How do I display posts from multiple tags?</p>
  
  <p>Thanks!</p>