Dynamically generated KML

G’day J,

This one’s in the FAQ:

Why won’t my KML map update when I edit the KML file?

Google Maps API caches the KML file, so it often won’t get your new changes. To force a change, append a URL query parameter with a number (known as a cache buster) and increment the number each time you change the KML file. A nice simple and commonly used parameter name is v (for version), like this: http://example.com/my-map.kml?v=2

So, add a query parameter to the source URL. I suggest using the output of the time() function, which will change every second. If you aren’t generating the shortcode dynamically, then you can use a filter hook to change the KML src:

add_filter('flexmap_shortcode_attrs', 'my_dynamic_kml');

function my_dynamic_kml($attrs) {
    // src attribute is specified and is a PHP file?
    if (isset($attrs['src']) && strpos($attrs['src'], '.php') !== false) {
        // append a cache buster
        $attrs['src'] = add_query_arg(array('v' => time()), $attrs['src']);
    }

    return $attrs;
}

cheers,
Ross