title: Wordpress meta_query how to use "like" comparison on meta_key
body: <p>I have to get posts having a particular meta value for a <code>dynamic meta key</code>.</p>
  <p>The <code>meta key</code> values will be:</p>
  <ul>
  <li>_project_global_1_trend_link</li>
  <li>_project_global_2_trend_link</li>
  <li>etc...</li>
  </ul>
  <p>The common text in meta key is <code>trend_link</code>. So I need to add <code>like operator</code> for <code>meta key</code>.</p>
  <pre><code>$posts = get_posts(array(
              'numberposts'   =&gt; -1,
              'post_type'     =&gt; 'projects',
              'meta_query' =&gt; array(
                  array(
                     'key'     =&gt; 'trend_link',
                     'value'   =&gt; 10,
                     'compare' =&gt; 'LIKE'
                  )
               )
          ));
  </code></pre>
  <p>By using this code I can apply <code>like operator</code> on <code>meta_value</code>.</p>
  <blockquote>
  <p>But I need to apply <code>like operator</code> on <code>meta_key</code>.</p>
  </blockquote>
  <p>Is there any way to apply <code>like operator</code> on <code>meta_key</code>.</p>
  <p>Please help !!</p>