enklenke

<?php

// address to map
$map_address = "";

$url = "http://maps.googleapis.com/maps/api/geocode/json?sensor=false&address=".urlencode($map_address);
$lat_long = get_object_vars(json_decode(file_get_contents($url)));

// pick out what we need (lat,lng)
$lat_long = $lat_long['results'][0]->geometry->location->lat . "," . $lat_long['results'][0]->geometry->location->lng;