php+mysql的双重md5，来通过discuz的用户验证

 
  $md = md5("abcdef");

  $handle = mysql_connect('localhost','discuz15','discuz15');
  mysql_select_db ('x15' );

  $sql = 'SELECT * from pre_ucenter_members where `password`=md5(concat("' . $md . '",`salt`))';

  echo $sql . "\n
";

  $result = mysql_query($sql);

  $arr = array();
  while ($row = mysql_fetch_assoc($result)) {
          $arr[] = $row;
  }

  var_dump($arr);
  mysql_close($handle);

  ?>