1. function rad($d)
    2. {
    3. return $d * M_PI / 180.0;
    4. }
    6. /**
    7. * 获取两个经纬度坐标点之间的距离，单位km，小数点后2位
    8. * @param string $lat1 纬度1
    9. * @param string $lng1 经度1
    10. * @param string $lat2 纬度2
    11. * @param string $lng2 经度2
    12. * @return string 距离
    13. */
    14. function getDistance($lng1, $lat1, $lng2, $lat2)
    15. {
    16. $EARTH_RADIUS = 6378.137; //地球半径
    17. $radLat1 = rad($lat1);
    18. $radLat2 = rad($lat2);
    19. $a = $radLat1 - $radLat2;
    20. $b = rad($lng1) - rad($lng2);
    21. $s = 2 * asin(sqrt(pow(sin($a/2),2) + cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)));
    22. $s = $s * $EARTH_RADIUS;
    23. $s = round($s * 100) / 100;
    24. return $s;
    25. }
    27. public static double getDistance(double longt1, double lat1, double longt2,double lat2) {
    28. double x, y, distance;
    29. x = (longt2 - longt1) * PI * R
    30. * Math.cos(((lat1 + lat2) / 2) * PI / 180) / 180;
    31. y = (lat2 - lat1) * PI * R / 180;
    32. distance = Math.hypot(x, y);
    33. return distance;
    34. }