title: Wordpress meta_query to compare 3 meta value with same meta key
body: <p>I would like to fetch all post that have meta_value Book, Study, Art. But when I put 3 array on meta_query system doesn't return anything, but if I put online 2 array It's work</p>
  
  <pre><code>// this working
       $args = array(
      'numberposts' =&gt; 10,
      'post_type' =&gt; 'content',
      'meta_query' =&gt; array(
          'relation' =&gt; 'OR',
          array(
              'key' =&gt; 'media_type',
              'value' =&gt; 'Book',
              'compare' =&gt; 'LIKE'
          ),
          array(
              'key' =&gt; 'media_type',
              'value' =&gt; 'Study',
              'compare' =&gt; 'LIKE'
          )       
      )
  );
  
  
  //this now working
   $args = array(
      'numberposts' =&gt; 10,
      'post_type' =&gt; 'content',
      'meta_query' =&gt; array(
          'relation' =&gt; 'OR',
          array(
              'key' =&gt; 'media_type',
              'value' =&gt; 'Book',
              'compare' =&gt; 'LIKE'
          ),
          array(
              'key' =&gt; 'media_type',
              'value' =&gt; 'Study',
              'compare' =&gt; 'LIKE'
          ),
          array(
              'key' =&gt; 'media_type',
              'value' =&gt; 'Art',
              'compare' =&gt; 'LIKE'
          )
      )
  );
  </code></pre>