Windows

edited httpd - added
# For PHP 4 do something like this:
LoadModule php4_module "c:/php/php4apache2.dll"
# Don't forget to copy the php4apache2.dll file from the sapi directory!
AddType application/x-httpd-php .php

# For PHP 5 do something like this:
#LoadModule php5_module "c:/php/php5apache2.dll"
#AddType application/x-httpd-php .php

# configure the path to php.ini
PHPIniDir "c:/php/"

Edited environment variables in windows - added c:/php/ to the path

Edited php.ini - extension_dir = "c:/php/extensions/"
uncommented mbstring extension