执行
foreach ( $results as $result ){
// code goes here ..
}
....
foreach ( $results as $result ){
// code goes here ..
}是因为两次遍历pdo resultSet造成的，解决办法：
$records = array();
foreach ($results as $result)
{
$records[] = $result;
}
This result is a forward only result set, calling rewind() after moving forward is not supported
原文：http://blog.csdn.net/wang_quan_li/article/details/41318271