You need to install PHP needed version with all modules. Here is an official docu, here is an example:
Than enable needed PHP Version in you webserver, and restart it.
There is a how to switch between different PHP versions e.g. for Ubuntu:
You need to install PHP needed version with all modules. Here is an official docu, here is an example:
Than enable needed PHP Version in you webserver, and restart it.
There is a how to switch between different PHP versions e.g. for Ubuntu: