php Thinkphp 经纬度查位置（误差200米左右）

/**
 * # +========================================================================
 * # | - @name        获取位置
 * # | - @author     cq <just_leaf@foxmail.com> 
 * # | - @copyright zmtek 2018-11-07
 * # +------------------------------------------------------------------------
 * # | - 1首页
 * # +========================================================================
 */
function getaddr($lng,$lat) {
    
    // http://www.gpsspg.com/maps.htm
    $result = file_get_contents('https://apis.map.qq.com/jsapi?qt=rgeoc&lnglat='.$lng.'%2C'.$lat.'&key=FBOBZ-VODWU-C7SVF-B2BDI-UK3JE-YBFUS&output=jsonp&pf=jsapi&ref=jsapi&cb=qq.maps._svcb3.geocoder0');
    $str     = explode('qq.maps._svcb3.geocoder0&&qq.maps._svcb3.geocoder0(',$result)[1];
    $text     = substr($str,0,strlen($str)-1);
    $pat     = '#"addr"(?<data>.*)","addr_info"#';
    preg_match($pat,$text,$mat);
    $str     = substr($mat[0],8,100);
    $addr     = explode('","addr_info":',$str)[0];
    $addr   = characet($addr);
    return $addr;
}

/**
 * # +========================================================================
 * # | - @name        转码utf8
 * # | - @author     cq <just_leaf@foxmail.com> 
 * # | - @copyright zmtek 2018-11-07
 * # +------------------------------------------------------------------------
 * # | - 1首页
 * # +========================================================================
 */
function characet($data){
    
    if( !empty($data) ){
        $fileType = mb_detect_encoding($data , array('UTF-8','GBK','LATIN1','BIG5')) ;
        
        if( $fileType != 'UTF-8'){
            
            $data = mb_convert_encoding($data ,'utf-8' , $fileType);
        }
    }
  return $data;
}