OpenStreetMap + OSRM Distance Matrix Open Source

 <?php

$start = "12.971598,77.594566"; // Bangalore coordinates

$end = "13.082680,80.270718";   // Chennai coordinates

// OSRM API endpoint

$url = "http://router.project-osrm.org/route/v1/driving/$start;$end?overview=false";

// Send GET request to OSRM API

$response = file_get_contents($url);

$data = json_decode($response, true);

// Check for a valid response

if (isset($data['routes'][0])) {

    $distance = $data['routes'][0]['distance']; // Distance in meters

    $duration = $data['routes'][0]['duration']; // Duration in seconds

    // Convert distance to kilometers and duration to minutes

    $distanceInKm = $distance / 1000;

    $durationInMinutes = $duration / 60;

    echo "Distance: " . round($distanceInKm, 2) . " km\n";

    echo "Duration: " . round($durationInMinutes, 2) . " minutes\n";

} else {

    echo "Error: Unable to calculate route.";

}

?>