Reusable socket

Question

I tryed to create a socket in php and reuse it from other process. I know this can be done with a daemon script but I want to do this without.

I created a socket and binded it to a specific port.

$sock = socket_create (AF_INET, SOCK_STREAM, SOL_TCP);  
socket_set_option ($sock, SOL_SOCKET, SO_REUSEADDR, 1); 
socket_bind ($sock, 'xx.xx.xx.xx', 10000);
socket_connect ($sock, $host, $port);

And from another php file I did the same thing. But the packets that I send from the 2 file are not "validated" by host. I sniffed all ports and I see that it uses same local and destination port. I don't understand where is the problem.

Can you help me with this? It's ok in any other programming language, or any other solution for this.

Andrew

Answer 1

You can't really use persistent sockets in php. When you execute a php file, a new process is created which cannot access the variables - or sockets - of a different php process so it won't know if there already exists a socket and just creates it.

Answer 2

Sockets are not symmetrical. The server side listens on a specific port for a client to conect - the client does not specify the local port - only the remote port and address. Its nothing to do with the language you implement it in.

There's a very good socket server implementation available at http://www.phpclasses.org/browse/package/5758.html with examples.

C.