What is the best practices to upgrade from PHP 5.4.45 to php 5.5 or higher ? Without breaking something ? 
I have i-MSCP 1.3.5 Build: 20161001 Codename: Horner - Debian Linux 7
PHP 5.4.45-0+deb7u5 (cli) (built: Sep 18 2016 13:28:42) Zend Engine v2.4.0, Copyright (c) 1998-2014
Good evening,
First of all, I would recommend you to maintain your i-MSCP installation up-to-date.
Regarding your question, there is an easy way and a hard way 
The easy way
Buy the PhpSwitcher plugin and you'll be able to provide your customers or your own sites with the PHP versions that you want (PHP 4.4, 5.2, 5.3, 5.4, 5.5, 5.6, 7.0, 7.1).
The hard way
You can always modify the i-MSCP packages file for your distribution by replacing it through a listener file. Your own packages file would install PHP through an external repository such as Dotdeb. You can find a example here: https://github.com/i-MSCP/imsc…ontrib/Listeners/Packages which has been made for Debian Jessie. Hence, it must be adapted using the packages file for Debian Wheezy.
Ahha 
PhpSwitcher plugin would be nice also for testing .....
We are talking about this ?
And thnx for the advice ... so i need to enable the Check for update in I mscp and follow instructions ..
Hello,
Yes, @Nuxwin is talking about this Plugin!
And here you can find an how-to Update i-mscp: https://wiki.i-mscp.net/doku.php?id=start:upgrade
Thnx !!!! But what is the Check for update in I mscp for ? Only to check ?
What does you mean exactly? For the plugin, you need to buy it first: https://i-mscp.net/index.php/PaidSubscriptionList/
