PHP json_encode mysql结果

$sql = mysql_query("SELECt * FROM item_details WHERe posting_id='$item_number'");$results = array();while($row = mysql_fetch_array($sql)){   $results[] = array(      'title' => base64_depre($row['title']),      'price' => $row['price'],      'seller_user' => $row['user']   );}$json = json_enpre($results);