How to install Piwigo 2.9.3 on CentOS 7

This video covers the method to install Piwigo 2.9.3 on CentOS 7. Piwigo is an open source PHP based content management system used for creating gallery focused websites.
For more explanation on this video: https://www.linuxhelp.com/how-to-install-piwigo-2-9-3-on-centos-7/

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centos 7