Use PHP7.4 proc_open() option to start without shell

As of PHP7.4 the cmd parameter may be passed as an array which will cause the program to be started directly without going through shell. See description of cmd at https://www.php.net/manual/en/function.proc-open for details.

I would like to try and get this working where we detect the PHP version and if we are >=7.4 we will use this feature so we can limit the amount of processes running. This aids in admin when using ps on linux to see if services are running.