<?php define('KM', 6364.963); define('MILES', 3955.00465); function GetDistance($la1, $lo1, $la2, $lo2, $r = KM) { $l1 = deg2rad($la1); $l2 = deg2rad($la2); $dg = deg2rad($lo2 - $lo1); $d = $r * acos(sin($l1) * sin($l2) + cos($l1) * cos($l2) * cos($dg)); return $d; } $lat1 = 55; $long1 = 12; $lat2 = 34; $long2 = -118; echo "The distance from Copenhagen to Los Angeles is " . round(GetDistance($lat1, $long1, $lat2, $long2)) . " km\n"; echo "The distance from Copenhagen to Los Angeles is " . round(GetDistance($lat1, $long1, $lat2, $long2, MILES)) . " miles\n"; ?>
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