Description:
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In the course of playing with my new Lighty server running on Debian, I ran into a problem with the PHP_SELF, PATH_INFO, and ORIG_PATH_INFO variables - specifically, Lighty doesn't provide them to my PHP install.

Even after applying all the fixes I could find:

Adding "broken-scriptfilename" => "enable" to my PHP config in lighttpd.conf

Set cgi.fix_pathinfo = 1 in /etc/php4/cgi/php.ini

Compiled PHP4 with ./configure --enable-fastcgi --enable-ftp --with-mysql --enable-force-redirect --enable-discard-path

Various combinations of these fixes didn't work either (PHP compiled with and without each/both of the cgi-related switches). I found a workaround for the KnowledgeTree? DMS: http://issues.ktdms.com/browse/KTS-1289 and a Google Answers post I made generated some good kludges(though neither of them work): http://google.com/answers/threadview?id=754764

This seems to be a fairly serious Lighty/PHP issue that affects a large number of people and currently has no resolution. If anyone wants any further information or wants to contribute ideas on how to fix this, feel free to e-mail me. 

Reproduce code:
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print $_SERVER["PATH_INFO"];
print $_SERVER["PHP_SELF"];
print $_SERVER["ORIG_PATH_INFO"];

Expected result:
----------------
null
null
null

Actual result:
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Given site.com/folder/script.php,
/folder
/folder/script.php
/folder