根据淘宝商品获得到某地区的运费

方法如下：

/**
     * 根据商品ID获取至广州的'快递'邮费 
     * @param type $id
     * @return type 邮费
     * author uuecs.Com
     */
    function get_fee_by_id($id) {
        $url = "http://delivery.taobao.com/detail/delivery_detail.do?itemId={$id}&areaId=440100";//广州邮编
        $contents = file_get_contents($url);
        $contents = iconv("gbk", "utf-8", $contents);
        $ret_price = FALSE;
        //如果返回不为空,则数据正确,进行提取
        if (!empty($contents)) {
            preg_match("/(?:'postDesc':\{'default':')(.*)(?:\'}\}+)/i", $contents, $matches);
            $need = $matches[1];
            $need = trim($need);
            $price_fee = 0;
            //如果 '卖家承担运费' ,则邮费为0 
            if (strpos($need, "卖家承担运费") !== FALSE) {
                $price_fee = 0;
            } else {
                $tem_ = preg_replace("/[\s]*(EMS.*)/i", '', $need);
                if (strpos($tem_, '快递') !== FALSE) {//如果是 '快递' 项
                    $tem_ = str_replace('快递:', '', $tem_);
                    if (strpos($tem_, '免运费') !== FALSE) {//如果是 '免运费' 项
                        $price_fee = 0;
                    } else {//如果有 价格, 则提取
                        preg_match("/([\d]+\.?[\d]+)/", $tem_, $matches_);
                        $price_fee = $matches_[1];
                    }
                }
            }
            $ret_price = floatval($price_fee);
        }
        return $ret_price;
    }