i used a code i found from another website, to read client's digital certificate:
here's the code (i can't post the code here, since it has too many html tags):
PHP Code:

but the output returned is always null....here's the partial output of the above code, when I tried to access my https page using Internet explorer.
PHP Code:
javax.servlet.request.key_size not present in this request
No certificate found
again :(
request authorization type is null
.getAuth ==> null
(request.BASIC_AUTH ==> BASIC

i really need help to resolve this problem here. been stuck here for a few days.

thanks a lot