I have a question about interprocess communication within PHP. What I want is to have one process to be continuously running, and to have other processes communicate with th
A very useful and popular interprocess communication mechanism is known as Sockets. PHP's support for it is just fine.
I can also recommend Sockets, but using the stream functions like stream_socket_server() etc.
Because these are more programmer-friendly than the "raw" socket functions
Depending on what exactly your needs are, you might wanna take a look at something lile ActiveMQ
Take a look at proc_open. I have not used it extensively, but you should be able to accomplish this using this function.