게시판 리스트를 사용자 기준 거리순으로 정렬하려고 하는데요

어렵습니다. 고수님들 아래 스크립트 보시고 조언좀 부탁드립니다."꾸벅"

<script>

//게시판리스트를 불러와 wr_1에 주소 검색
var position = [
<?
$sql = "select * from g5_write_atable1 order by wr_num";
$result = sql_query($sql);
while($row = sql_fetch_array($result)) {
  $address = $row['wr_1'];
  $url = "https://dapi.kakao.com/v2/local/search/address.json?query=".urlencode($address);
 
}

//좌표구하기
if($result["documents"][0]->road_address->x){
 $lat = $result["documents"][0]->road_address->y;
 $Ing = $result["documents"][0]->road_address->x;
}else{
 $lat = $result["documents"][0]->address->y;
 $lng = $result["documents"][0]->address->x;
}
curl_close($ch);//종료 
?>
]

//거리계산 함수

function getDistance(lat1, lon1, lat2, lon2, unit) {

var radlat1 = Math.PI * lat1/180
var radlat2 = Math.PI * lat2/180
var radlon1 = Math.PI * lon1/180
var radlon2 = Math.PI * lon2/180
var theta = lon1-lon2
var radtheta = Math.PI * theta/180
var dist = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2)
dist = Math.acos(dist)
dist = dist * 180/Math.PI
dist = dist * 60 * 1.1515
if (unit == "k") { dist = dist * 1.609344 }
if (unit == "N") { dist = dist * 0.8684 }
return dist
}

//현재사용자 위치

navigator.geolocation.getCurrentPosition(function(position) => {
 var latitude = position.coords.latitude, // 위도
 var longitude = position.coords.longitude; // 경도

//반복문

for (var i=0; i<position.length; i++) {
var distance = getDistance(latitube, longitube, position[i].latitube, position[i].longitube, "k");
position[i].distance = distance;
}

//디스턴스 정렬

var newTourList = position.sort(function (a, b) {
 if (a.distance > b.distance) {
renturn 1;
}
if (a.distance < b.distance) {
return -1;
}
// a must be equal to b
return 0;
});

} (err) => {
});
</script>