title: How to match multiple field in mySQL
body: <p>Im trying to match forum_id with several different forum_id's, something like forum_id = 5,7,12,43,63,78</p>
  
  <p>I currently have this code:</p>
  
  <pre><code>SELECT topic_title, topic_id, forum_id 
  FROM $MYSQL_TOPIC 
  WHERE topic_title 
  LIKE '%%%s%%' 
      AND forum_id = 5 
  LIMIT 50
  </code></pre>
  
  <p>(using mysql_real_escape_string and sprintf)</p>
  
  <p>I tried:</p>
  
  <pre><code>forum_id = 5 OR 7
  forum_id = 5|7
  forum_id = 5 AND 7
  forum_id = 5 &amp; 7
  </code></pre>
  
  <p>But none of them will match them all and therefore search though them all.</p>