Changes in /etc/php5/cgi/php.ini and in /etc/php5/apache2/php.ini not reflected in vhost php.ini

I have made changes in both the files in /etc/php5/cgi/php.ini and /etc/php5/apache2/php.ini
like this

Code:

mail.log = /var/log/phpmail

but while checking the php.info for the website I am getting

Code:

mail.log no value no value

What I am doing wrong here, as I want the mail.log to be affected to all vhost.
what I am doing wrong here?

 

Thanks Till I wanted all the vhost php.ini file to be updated which was edited in /etc/php5/cgi/php.ini.
but I think I have resolved it. I run sync tools resync and now I am getting the updated file for the path for log in all websites.
is this the correct method to propagate the update to all vhost.ini file from main php.ini file?

 

Thanks