Getting Latitude And Longitude From Pin Code Using PHP

<?php
    $zipcode="92604";
    $url = "http://maps.googleapis.com/maps/api/geocode/json?address=".$zipcode."&sensor=false";
    $details=file_get_contents($url);
    $result = json_decode($details,true);
   // print_r($result);
    $lat=$result['results'][0]['geometry']['location']['lat'];

    $lng=$result['results'][0]['geometry']['location']['lng'];

    echo "Latitude :" .$lat;
    echo '<br>';
    echo "Longitude :" .$lng;
    ?>