title: imap_search not working with multiple criteria in php
body: <p>I am doing webmail project in php with imap. imap_search function is not working with multiple criteria. In single search criteria it is working fine. 
  This is my code:</p>
  
  <pre><code>$boxes = imap_search($mbox, 'OR SUBJECT "'.$search_keyword.'" BODY "'.$search_keyword.'"', SE_UID);
  </code></pre>