PHP根據兩點間的經緯度計算距離_php技巧

這是一個不錯的樣本，直接貼代碼，首先要知道緯度值、經度值

/** * @desc 根據兩點間的經緯度計算距離 * @param float $lat 緯度值 * @param float $lng 經度值 */ function getDistance($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 http://en.wikipedia.org/wiki/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); }