Php course security

Php process security? Does php process processes one by one or multiple processes? is the process safe if it is a multi-process? Why is it fast in fastcgi mode? what is Php processing processes. The php interpreter is a process that interprets and executes a PHP script and then destroys the process. Of course, multi-process security does not share things, and shared resources are also locked. Fastcgi is because the PHP interpreter acts as a server program to listen to network connections and no longer frequency php process security?
Does php process processes one by one or multiple processes? is the process safe if it is a multi-process? Why is it fast in fastcgi mode?

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Php processes.

The php interpreter is a process that interprets and executes a PHP script and then destroys the process.

Of course, multi-process security does not share things, and shared resources are also locked.

Fastcgi is because the PHP interpreter monitors network connections as a server program and does not frequently create or destroy it.
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Upstairs
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A process corresponds to a PHP interpreter. Php-fpm is a process manager. at startup, N processes are initialized (10 by default), and the N processes are responsible for script processing, unless php-fpm is restarted or stopped, the N processes will remain alive. after processing a request, wait for php-fpm to allocate the next request, saving the overhead for frequent process destruction and creation.
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A singleton is an example. a fcgi process can only execute one script. your Singleton is multi-process and cannot be shared.