Geotest

add_filter( 'the_content', 'geocode_test' );

function geocode_test( $content ) {
    if ( ! isset($_GET['geotest'] ) ) return $content;
    remove_filter( 'the_content', 'geocode_test' );

    $test_address = '3100 Central Ave  (at Fountain) ALAMEDA  CA CA  United Statese';
    $url = 'http://maps.googleapis.com/maps/api/geocode/json?address=' . urlencode( $test_address ) . '&sensor=false';

    $result = wp_remote_get($url);

    ob_start();
    var_dump( $result );
    $result = ob_get_clean();

    return '<pre>' . $result . '</pre>' . $content;
}