How to update php 5.3 to 5.x.x or stable once

Hi There,

I am running my system with Apache on Linode.

My System Details:

root@li795-236:~# lsb_release -a

No LSB modules are available.

Distributor ID: Ubuntu

Description: Ubuntu 12.04.5 LTS

Release: 12.04

Codename: precise

Current php version is: 5.3.10

root@li795-236:~# php -v

PHP 5.3.10-1ubuntu3.18 with Suhosin-Patch (cli) (built: Apr 17 2015 15:11:25)

Copyright © 1997-2012 The PHP Group

Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies

with Suhosin v0.9.33, Copyright (c) 2007-2012, by SektionEins GmbH

root@li795-236:~#

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Q. Could you please guide me to update my server PHP version like 5.4.x / 5.5.x / 5.6.x / any of latest stable version?

Thanks in advance.

Weblizar