PHP根据经纬度,计算2点之间的距离的2种方法
计算地球表面2点之间的球面距离
/** * @param $lat1 * @param $lng1 * @param $lat2 * @param $lng2 * @return int */ function getDistance($lat1, $lng1, $lat2, $lng2){ //将角度转为狐度 $radLat1=deg2rad($lat1);//deg2rad()函数将角度转换为弧度 $radLat2=deg2rad($lat2); $radLng1=deg2rad($lng1); $radLng2=deg2rad($lng2); $a=$radLat1-$radLat2; $b=$radLng1-$radLng2; $s=2*asin(sqrt(pow(sin($a/2),2)+cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)))*6378.137; return $s; } /** * @param $lat1 * @param $lon1 * @param $lat2 * @param $lon2 * @param float $radius 星球半径 * @return float */ function distance($lat1, $lon1, $lat2,$lon2,$radius = 6378.137) { $rad = floatval(M_PI / 180.0); $lat1 = floatval($lat1) * $rad; $lon1 = floatval($lon1) * $rad; $lat2 = floatval($lat2) * $rad; $lon2 = floatval($lon2) * $rad; $theta = $lon2 - $lon1; $dist = acos(sin($lat1) * sin($lat2) + cos($lat1) * cos($lat2) * cos($theta) ); if ($dist < 0 ) { $dist += M_PI; } return $dist = $dist * $radius; } $lat1 = '31.253411'; $lon1 = '121.518998'; $lat2 = '31.277117'; $lon2 = '120.744587'; echo getDistance($lat1, $lon1, $lat2, $lon2); // 73.734589823361 echo distance($lat1, $lon1, $lat2, $lon2); // 73.734589823354