根据经纬度之间的值算距离

/**
* @desc 根据两点间的经纬度计算距离
* @param float $lat 纬度值
* @param float $lng 经度值
*/
protected function getDistance($lat1,$lng1,$lat2,$lng2)
{
    
    $earthRadius = 6367000; //approximate radius of earth in meters
    
    $lat1 = ($lat1 * pi() ) / 180;
    $lng1 = ($lng1 * pi() ) / 180;
    
    $lat2 = ($lat2 * pi() ) / 180;
    $lng2 = ($lng2 * pi() ) / 180;

    $calcLongitude = $lng2 - $lng1;
    $calcLatitude = $lat2 - $lat1;
    $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
    $stepTwo = 2 * asin(min(1, sqrt($stepOne)));
    $calculatedDistance = $earthRadius * $stepTwo;
    return round($calculatedDistance);
 }