How do scripting languages use sockets?

Question

Python, Perl and PHP, all support TCP stream sockets. But exactly how do I use sockets in a script file that is run by a webserver (eg Apache), assuming I only have FTP acce

Answer 1

When a client connects to a specific port, how does the script file get invoked?

The script should be already invoked in order to receive any connects from any client. You will need script to be hanging on there forever (infinie loop) and setup Apache not to kill it on timeout. Basically, PHP is not a good choice for writting server applications. Why do you need this?