title: PDO::PARAM_INT is important in bindParam?
body: <p>Add <code>PDO::PARAM_INT</code> or <code>PDO::PARAM_STR</code> have any meaning in Mysql query?</p>
  
  <pre><code>$sql  = 'SELECT TagId FROM tagthread WHERE ThreadId = :ThreadId';
  
  $stmt = $this-&gt;db-&gt;prepare($sql);
  $stmt-&gt;bindParam(':ThreadId', $threadid, PDO::PARAM_INT);
  
  $stmt-&gt;execute();
  </code></pre>