百度地图api 通过地址获取坐标

 function addresstolatlag($address){  
      
            $url='http://api.map.baidu.com/geocoder/v2/?address='.$address.'&output=json&ak=e089ujgakYGeFsNnDgn4AyyZE7FzjG14';  
                if($result=file_get_contents($url))  
                {  
      
                    $res= explode(',"lat":', substr($result, 40,36));  
      
      
                    return   $res;  
      
                }  
      
      
      
    }