Description:
------------
The filter extension appears to have issues with CLI. I have not fully tested it but will provide examples below to demonstrate the problem.

These tests use INPUT_SERVER, but others may be affected. Note: The same code is working correctly for me in mod_php.

Reproduce code:
---------------
philip$ cat > foo.php
<?php
var_dump( filter_input(INPUT_SERVER, 'PHP_SELF') );
var_dump( $_SERVER['PHP_SELF'] );
^C
philip$ php foo.php 
NULL
string(7) "foo.php"

philip$ php -r 'var_dump($_SERVER["PHP_SELF"]);'
string(1) "-"
philip$ php -r 'var_dump( filter_input(INPUT_SERVER, "PHP_SELF"));'
NULL