title: Laravel DB::raw() not executing query but manual execute works
body: <p>I am running this query </p>
  
  <pre><code>$query = "update my_cloud set full_dir_url = replace(full_dir_url, '$findWhat', '$replaceWith') where full_dir_url like '$findWhat/%' or where full_dir_url = '$findWhat' ";
  DB::raw($query);
  echo $query;
  </code></pre>
  
  <p>Output of <code>echo $query</code> is </p>
  
  <blockquote>
    <p>update my_cloud set full_dir_url = replace(full_dir_url, '/1st Year/Slide', '/1st Year/Slides') where full_dir_url like '/1st Year/Slide/%' or where full_dir_url = '/1st Year/Slide' </p>
  </blockquote>
  
  <p>When I run this query in phpmyadmin sql editor, data is updated as expected.</p>
  
  <p>But that <code>DB::raw($query)</code> doesn't update any data. No error log either. </p>