ajax+php 无刷新数据调用经典实例

//s.php文件
$Db = new Db();
  $type = ( $action=='esfPice')?1:2;  
  $sql = "Select * from cn_loupan_city_price where city_id ='$cid' and price_type='$type'";
  $query = $Db->query( $sql );
  $str ='';
  if( $Db->rows( $query ) )
  {
   $result = $Db->fetch( $query ,0);
   foreach( $result as $_v => $v )
   {
    
    $str .= "

".$v['city_price_show']."

";    
   }
   echo $str;
  }
  else
  {
   exit('可不选!');
  }  
  //这里只讲ajax不讲数据库教程连接
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