I\'m trying to install php 5.6 on Amazon linux using the following command:
$ yum install php56
No package php56 ava
AWS has not yet packaged php 5.6. You need to install php 5.5 from the ALAMI repositories, or build 5.6 from source.
To list the available 5.5 packages use yum search php55
The php55 is the base package, but you may need others listed as well.
When 5.6 is ready, you'll be able to find it with
yum search php56
You can find information on building the source at php.net, specifically Installation on Unix Systems / Apache 2.x on Unix Systems