We will be upgrading PHP on all Plesk servers to version 5.3.3

The servers will be upgraded on Tuesday 25th March 2014.

Below is a migration guide and list of deprecated features :

http://uk1.php.net/migration53
http://www.php.net/manual/en/migration53.deprecated.php

You might also find this useful:

http://www.php.net/manual/en/migration53.new-features.php

Many Thanks