Symfony 2: Install and enable the intl extension
http://php.net/manual/en/intl.requirements.php
This extension is bundled with PHP as of PHP version 5.3.0. Alternatively, the PECL version of this extension may be used with all PHP versions greater than 5.2.0 (5.2.4+ recommended).
also read my comment to your post above
Follow these steps:
- Copy all the file names starting with "icu" from C:\wamp\bin\php\php5.5.12 and paste to C:\wamp\bin\apache\apache2.4.9\bin (I am using WAMP. Figure it out yourself for XAMP.)
You can try. Nothing will harm. If you feel the things are not working, you can delete them. I am sure it will work for you 100%.
Uncomment the following line on C:\wamp\bin\apache\apache2.4.9\bin\php.ini
extension=php_intl.dll
It will work.