In this article, I will show you how to easily change the PHP version for each domain.  Versions PHP 8. 0 to 8. 3 are now available.  Version 7. 4 is still available for backward compatibility but is no longer recommended. <br />
Changing the PHP Version<br />
Login to the Web Interface: Log in to the web interface (Plesk). <br />
Select Domain: Go to &#8222;Domains&#8220; and select the website for which you want to change the PHP version. <br />
Adjust PHP Settings: Click on &#8222;PHP Settings. &#8220;<br />
Select PHP Version: Choose the desired PHP version (8. 0 to 8. 3). <br />
Save Selection: Click &#8222;Ok&#8220; to save the new PHP version. <br />
The new setting will be active after about 3 minutes. <br />
FastCGI vs.  FPM: What is the Difference?<br />
FastCGI:<br />
Performance: FastCGI offers better performance compared to traditional CGI because it doesn&#8217;t start a new process for each request. <br />
Stability: FastCGI processes run isolated, which means they aren&#8217;t affected by crashes of other processes. <br />
Usage: Ideal for smaller applications and websites with moderate traffic. <br />
FPM (FastCGI Process Manager):<br />
Performance: FPM further optimizes FastCGI, offering better performance and scalability for PHP applications. <br />
Stability: FPM can manage different pools of PHP processes with various configurations, providing more flexibility and stability. <br />
Usage: Best for large websites and applications with high traffic, requiring efficient resource management.