What role does libapache2-mod-php7.0 play in ensuring PHP functionality on an Apache server, and how is it installed?

To ensure PHP functionality on an Apache server, the libapache2-mod-php7.0 module needs to be installed. This module integrates PHP with Apache, allowing the server to process PHP files and generate dynamic content. To install libapache2-mod-php7.0, you can use the package manager for your operating system, such as apt for Ubuntu or yum for CentOS. ```bash sudo apt-get install libapache2-mod-php7.0 ```