apache 2.2 + mod_fastcgi configured as konstantin at symbi dot org comment (all request are sent to FPM):
Request http://my.site/test_mem.php?N=1
-----------------------------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO is unset
PATH_TRANSLATED is unset


apache 2.2 + mod_fastcgi configured as konstantin at symbi dot org comment (all request are sent to FPM):
Request http://my.site/test_mem.php/toto?N=1
-----------------------------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO=/toto
PATH_TRANSLATED=/home/fat/web/docs/php/toto


apache 2.2 + mod_fastcgi configured more commonly (see above -- only .php uri)
Request http://my.site/test_mem.php?N=1
---------------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/php-fpm-handler
SCRIPT_NAME=/php-fpm
REQUEST_URI=/test_mem.php?N=1
QUERY_STRING=N=1
PATH_INFO=/test_mem.php
PATH_TRANSLATED=/home/fat/web/docs/php/test_mem.php


apache 2.2 + mod_fastcgi configured more commonly (see above -- only .php uri)
Request http://my.site/test_mem.php/toto?N=1
---------------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/php-fpm-handler
SCRIPT_NAME=/php-fpm
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
PATH_INFO=/test_mem.php/toto
PATH_TRANSLATED=/home/fat/web/docs/php/test_mem.php/toto


apache 2.2 + mod_fcgid
-----------------------
mod_fcgid can't connect to an external FCGI process. So it can't be used with FPM.

apache 2.3.12 + mod_proxy_fcgi
Request http://my.site/test_mem.php?N=1
------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=proxy:fcgi://127.0.0.1:9000/test_mem.php
REQUEST_URI=/test_mem.php?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO is not set
PATH_TRANSLATED is not set


apache 2.3.12 + mod_proxy_fcgi
Request http://my.site/test_mem.php/toto?N=1
------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=proxy:fcgi://127.0.0.1:9000/test_mem.php/toto
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php/toto
PATH_INFO is not set
PATH_TRANSLATED is not set


apache 2.3.12 + mod_proxy_fcgi with proxy-fcgi-pathinfo
Request http://my.site/test_mem.php?N=1
------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=proxy:fcgi://127.0.0.1:9000/test_mem.php
REQUEST_URI=/test_mem.php?N=1
QUERY_STRING=N=1
SCRIPT_NAME=(empty string)
PATH_INFO=/test_mem.php
PATH_TRANSLATED=proxy:fcgi://127.0.0.1:9000/test_mem.php/toto/test_mem.php


apache 2.3.12 + mod_proxy_fcgi with proxy-fcgi-pathinfo
Request http://my.site/test_mem.php/toto?N=1
------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=proxy:fcgi://127.0.0.1:9000/test_mem.php/toto
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=(empty string)
PATH_INFO=/test_mem.php/toto
PATH_TRANSLATED=proxy:fcgi://127.0.0.1:9000/test_mem.php/toto/test_mem.php/toto


nginx with default configuration
Request http://my.site/test_mem.php?N=1
--------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO is unset
PATH_TRANSLATED is unset


nginx with default configuration + PATH_INFO support
Request http://my.site/test_mem.php?N=1
----------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME=/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO=(empty string)
PATH_TRANSLATED=/home/fat/web/docs/php


nginx with default configuration
Request http://my.site/test_mem.php/toto?N=1
----------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME==/home/fat/web/docs/php/test_mem.php/toto
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php/toto
PATH_INFO is not set
PATH_TRANSLATED is not set


nginx with default configuration + PATH_INFO support
Request http://my.site/test_mem.php/toto?N=1
----------------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME==/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO=/toto
PATH_TRANSLATED=/home/fat/web/docs/php/toto


lighttpd default configuration
Request http://my.site/test_mem.php?N=1
--------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME==/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO=(empty string)
PATH_TRANSLATED is not set


lighttpd default configuration
Request http://my.site/test_mem.php/toto?N=1
--------------------------------------------
DOCUMENT_ROOT=/home/fat/web/docs/php
SCRIPT_FILENAME==/home/fat/web/docs/php/test_mem.php
REQUEST_URI=/test_mem.php/toto?N=1
QUERY_STRING=N=1
SCRIPT_NAME=/test_mem.php
PATH_INFO=/toto
PATH_TRANSLATED=/home/fat/web/docs/php/toto