Dynamic kml google maps

Question

I want to create a google maps app with kml, and i want to create the kml file dynamically depending on the zoom of the user.

Something like google earth but in google maps (the zooming part)

I tried to use the markermanager and clusterer but i have too many markers and performance on mobile devices is very bad but with kml that is not an issue but i have all marker displayed at once.

I tried to use NetworkLink in the kml file but i dont get any parameters like zoom or bounds (i am using php)

I know it could be done with JavaScript

new google.maps.KmlLayer('mykmlgenerator.php?zoom='+zoom);

but i would like to avoid that is there any way?

thank you