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Putting It All Together - PHP

You might not know this, but PHP comes with a very capable socketprogramming API. These socket functions now include almost everything youwould need for socket-based client-server communication over TCP/IP, andcan be easily deployed to build simple network applications. Find out more,inside.

  1. Socket Programming With PHP
  2. Putting It All Together
  3. Fortune's Fool
  4. Looping The Loop
  5. On Web-bed Feet
  6. Different Strokes
  7. POP Goes The Weasel
  8. Access Denied
  9. Game Over
By: icarus, (c) Melonfire
Rating: starstarstarstarstar / 204
February 05, 2002

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Now, how about seeing it in action? Since this script generates an "always-on" socket, it isn't a good idea to run it via your Web server; instead, you might prefer to run it from the command line via the PHP binary:

$ /usr/local/bin/php -q server.php
In case you don't have a PHP binary, it's fairly easy to compile one - just follow the installation instructions for compiling a static Apache module (these instructions are available in the PHP distribution), but omit the "--with-apache" parameter to the "configure" script.

Note the additional -q parameter to PHP - this tells the program to suppress the "Content-Type: text/html" header that it usually adds when executing a script (I don't need this header here because the output of this script isn't going to a browser).

Once the script has been executed and the socket server is active, you can simply telnet to it using any standard telnet application, and send it a string of characters as input. The server should respond with the reversed string, and then terminate the connection. Here's what it looks like:

$ telnet 1234 Trying Connected to medusa. Escape character is '^]'. jack and the beanstalk klatsnaeb eht dna kcaj Connection closed by foreign host.

>>> More PHP Articles          >>> More By icarus, (c) Melonfire

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