I was setting up a VPS server for my client and we had talked that I would install the last stable versions of the programs. Now, in Debian 7 wheezy by default php 5.4 and mysql 5.5 are available. I am aware of how to upgrade to php 5.6 and mysql 5.6, but the question is - as it is not available from debian's official packages is it recommended to upgrade? what are the pros and cons of doing so? are there any security issues that might appear from upgrading ?