On the WP dashboard you will find the following message:
This means that the PHP version on your web server is running an old version of PHP.
We strongly advise you to contact your web hosting company!
You need a newer version of PHP to increase the safety, performance and stability of your web server.
Version 4.2 of WordPress, named “Powell” in honor of jazz pianist Bud Powell, is available for download or update in your WordPress dashboard. New features in 4.2 help you communicate and share, globally.