PHP完全自学手册(珍藏版) 中文pdf扫描版下载
- /**
- * @desc 根据两点间的经纬度计算距离
- * @param float $lat 纬度值
- * @param float $lng 经度值
- */
- function getDistance($lat1, $lng1, $lat2, $lng2) {
- $earthRadius = 6367000;
- $lat1 = ($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);
- }
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