Description:
------------
It seems then when using Per Directory Values in the Windows Registry, these values can then not be changed with ini_set() - for example we set the sendmail_from value for each individual website using the registry-based Per Directory Values, but the website owners should then be able to set their own from address in their scripts using ini_set().

As I understand it, the in-script ini_set() should be the last possible place a value can be changed (at runtime); not the registry.

Removing the registry entry gives the expected result of:

notset@notset.com
webmaster@example.com

Reproduce code:
---------------
php.ini
sendmail_from = notset@notset.com

HKLM\SOFTWARE\PHP\Per Directory Values\[DirPath]
sendmail_from = noreply@example.com

<?php
echo ini_get("sendmail_from") . "<br>";
ini_set("sendmail_from", "webmaster@example.com");
echo ini_get("sendmail_from");
?>

Expected result:
----------------
noreply@example.com
webmaster@example.com

Actual result:
--------------
noreply@example.com
noreply@example.com