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编辑当前文件:/home/digitalh/network.digitalhubbd.com/fns/firewall/geo_location.php
<?php function calc_distance($lat1, $lon1, $lat2, $lon2, $unit = 'K') { $theta = $lon1 - $lon2; $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta)); $dist = acos($dist); $dist = rad2deg($dist); $miles = $dist * 60 * 1.1515; $unit = strtoupper($unit); if ($unit == "K") { $miles = ($miles * 1.609344); return number_format((float)$miles, 2, '.', '').' Km'; } else if ($unit == "N") { return ($miles * 0.8684).' N'; } else if ($unit == "M") { return $miles.' M'; } }
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