I am quite new to Linux servers, but I found something strange to me and maybe someone can give a proper explanation for this: In PLESK Admin Panel on "Hosting Settings" for my domain the PHP version is 5.6. But when I access via SSH to my server and type php -v it says that I have version 5.4. Why the information is different and which one is the real?
When you run php -v via ssh session, you run system or OS vendor's php. Plesk PHPs for hosting are located in /opt/plesk/php/X.X/bin/php where X.X is version of PHP.