区域内店铺搜索如何做到？

Question

本人要写一个餐饮网站，要搜索客户所属区域的店铺，请问如何做到。本人想用百度的lbs云可是总是报101 ak参数不存在的错误，代码如下:

public function createtable(){

        $url="http://api.map.baidu.com/geodata/v3/geotable/create";
        $data=array();
        $data['name']="ktable";
        $data['geotype']=1;
        $data['is_published']=1;
        $data['ak']="WXKcVBH1bFcGAsm6eQuwFBXh";
        $data['timestamp']=time();
        $json=json_encode($data);
        $ujson=urlencode($json);
        //$data=urlencode($data);
        dump($json);
        $re=$this->wxpost($url,$ujson);
        dump($re);

    }

    private function wxpost($url,$postdata){
     $ch = curl_init();//初始化curl
     curl_setopt($ch,CURLOPT_URL,$url);//抓取指定网页
     curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
     //curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
     curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/x-www-form-urlencoded'));
     //curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json;charset=utf-8'));
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
     curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
     curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
     $data = curl_exec($ch);//运行curl
     curl_close($ch);
     return $data;
   }

然后就想用其他方法来做了?所以前来请问一下有什么方法？