i need single sign on software for our php website , For all application, because we used visual basic and php, and another things so we need software to do single sign on , that the user logs once to his page , and logs out when ever he want .
as i said this software must be for all application i mean it shoud not be written by aprogramming language , i;m looking for this product , but till now i found software under the name sso (single sign on) , but it does not do that for me , it provides some security i don't know what to type in google in order to find what i'am looking for.
is there any one have an idea about this software? please give me help!!