KML URL encoding

Hi, I want to send variables to the URL I specify e.g.

http://mydomain.org/getKMLphp.php?start=19-06-2015&end=22-06-2015

However the ampersand gets encoded (&). Therefore the second variable is not available.

Can this be fixed quickly & easily?

Thanks

https://ww.wp.xz.cn/plugins/wp-google-maps/