New Function fpm_get_status() in PHP-FPM

When running PHP using FPM, the FastCGI process manager, a new function is available since PHP 7.3, namely fpm_get_status(). Note that this function is not available when running PHP at the command line:

PHP Fatal error:  Uncaught Error: Call to undefined function fpm_get_status() in ...

When run inside FPM, the function will return the FPM status information that also makes up the FPM status page, allowing for building advanced status pages.