Dose phpBB have a native method to add parameter to the existing url?
For example i wanna add
mypara=a
to the existing url.But when i use
?mypara=a
in <a> Tag
it will add it to the end of the url with ?
. But i wanna check the url first, if its already a parameter in url, add &mypara=a
otherwise add ?mypara=a
Thanks