$cha1 = new Model();
$shops = $cha1->query("select *,(2 * 6378.137* ASIN(SQRT(POW(SIN(3.1415926535898*(".$lat."-lat)/360),2)+COS(3.1415926535898*".$lat."/180)* COS(lat * 3.1415926535898/180)*POW(SIN(3.1415926535898*(".$lng."-lng)/360),2))))*1000 as juli from `wifi_shop`
where shoplevel like '%".$type."%' and province = '".$_SESSION['shop']['province']."' and city = '".$_SESSION['shop']['city']."' order by juli asc limit ".$Page->firstRow.",".$Page->listRows);
代碼中$lat和$lng就是已知的那個坐标的經緯度,排序出來的機關是米因為我乘以1000了,where後面的查詢條件可以根據需要編輯,limit後面是分頁的,可以不要或者自己編輯
然後php代碼中計算出兩個坐标點距離的方法是,這個方法也是傳回的機關米
function GetDistance($lat1, $lng1, $lat2, $lng2){
define('PI',3.1415926535898);
define('EARTH_RADIUS',6378.137);
$radLat1 = $lat1 * (PI / 180);
$radLat2 = $lat2 * (PI / 180);
$a = $radLat1 - $radLat2;
$b = ($lng1 * (PI / 180)) - ($lng2 * (PI / 180));
$s = 2 * asin(sqrt(pow(sin($a/2),2) + cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)));
$s = $s * EARTH_RADIUS;
$s = round($s * 10000) / 10000;
return $s*1000;
}