A new guide has been published: How to install PHP 5.6 and 7.0 - 8.2 with PHP-FPM and FastCGI mode for ISPConfig 3.2 with apt on Debian 9 to 11
A tutorial on Howtoforge explains how to use apt on Debian GNU/Linux to install PHP 5.6–8.2 with PHP-FPM and FastCGI mode for ISPConfig 3.2.
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