The two .ini files you say are in your php directory, are they the php.ini-development and the php.ini-production files? If so, you do not need to modify them, they act as templates. You should copy one of them as php.ini and then modify this php.ini file as needed.
As you know, the different extensions are enabled by opening the php.ini file and removing the initial semicolon from the corresponding line, for example:
;extension=php_curl.dll ; disabled extension
extension=php_curl.dll ; enabled extension (without the initial semicolon
** For the intl extension, you should also set the intl.default_locale and intl.error_level directives:
intl.default_locale = es_utf8
intl.error_level = E_WARNING
** For the openssl, you only need to enable the extension.
** For the curl extension you should first try by only enabling the extension.
Once you have done all the required changes, save the php.ini file and restart you web server.
If you still get any error messages regarding the cUrl extension, then:
1. Go to the php folder.
2. Copy the icudt49.dll, the icuin49.dll and the icuuc49.dll files.
3. Go to the Apache bin directory.
4. Paste the three files:
Restart your Apache web server and retry your Moodle install process.