Description:
------------
Under PHP 5, when PHP is invoked from a CGI script (using Apache 2.0.54's standard mod_cgi mechanism), the PATH_INFO environment variable is always empty.

I've found that this problem is related to the "cgi.fix_pathinfo" option. When this option is set to 1 -- the default in PHP 5.0.5 -- PATH_INFO is always empty. When this option is set to 0 -- the default in PHP 4.4.0 -- PATH_INFO is set correctly.

This same(?) issue was reported in Bug #23800, but apparently the reporter was content with just setting cgi.fix_pathinfo=0 and closing the report. The actual problem with PATH_INFO being empty when cgi.fix_pathinfo=1 went unaddressed.

I do not see any reason to believe this behavior is correct. The (rather vague) documentation for cgi.fix_pathinfo states:

"...For more information on PATH_INFO, see the cgi specs. Setting this to 1 will cause PHP CGI to fix it's paths to conform to the spec."

The CGI specs certainly don't say that PATH_INFO should be an empty string, so we aren't seeing increased conformance with the spec here. On the contrary, setting PATH_INFO to an empty string when there is path info introduces non-conformance with the spec.


My PHP configure line:
./configure --prefix=/usr/local/php-cgi --enable-track-vars --with-mysql --with-zlib --with-openssl --enable-discard-path

Reproduce code:
---------------
Create a file named "test.cgi" with these four lines:

#!/usr/local/php-cgi/bin/php
<?php
phpinfo();
?>

Give it execute permission (chmod +x), and place it in <document root>/cgi-bin. Then open the following URL:

http://<hostname>/cgi-bin/test.cgi/extrapathinfo

Expected result:
----------------
In the Environment table, I expect to see the following:

PATH_INFO        /extrapathinfo

Actual result:
--------------
PATH_INFO        no value
ORIG_PATH_INFO   /extrapathinfo

(PHP has copied the original PATH_INFO value to ORIG_PATH_INFO, and cleared PATH_INFO.)