mafalb

<?php

function distance($latFrom, $lonFrom, $latTo, $lonTo) {
  $earthRadius = 6371000; // in meter

  // convert from degrees to radians
  $latFrom = deg2rad($latFrom);
  $lonFrom = deg2rad($lonFrom);
  $latTo = deg2rad($latTo);
  $lonTo = deg2rad($lonTo);