Features / Usability

I ckecked my php.ini file and it does not list fileinfo.

From php.ini:
[ExtensionList]
extension=php_mysql.dll
extension=php_mysqli.dll
extension=php_mbstring.dll
extension=php_gd2.dll
extension=php_gettext.dll
extension=php_curl.dll
extension=php_exif.dll
extension=php_xmlrpc.dll
extension=php_openssl.dll
extension=php_soap.dll
extension=php_pdo_mysql.dll
extension=php_pdo_sqlite.dll
extension=php_imap.dll
extension=php_tidy.dll

Is the fix as simple as adding extension=php_fileinfo.dll to the list, saving the file, and restarting my server?

Sorry is this is a noob question, but I'm new to php and don't want to mess anything up.