PHP根据两点间的经纬度计算距离
这篇文章主要介绍了PHP如何根据两点间的经纬度计算距离，代码很简单，但很实用，需要的朋友可以参考下
这是一个不错的示例，直接贴代码，，首先要知道纬度值、经度值
/** * @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; //approximate radius of earth in meters /* Convert these degrees to radians to work with the formula */ $lat1 = ($lat1 * pi() ) / 180; $lng1 = ($lng1 * pi() ) / 180; $lat2 = ($lat2 * pi() ) / 180; $lng2 = ($lng2 * pi() ) / 180; /* Using the Haversine formula calculate the distance */ $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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