anyone help me to create client server chatting using php?

anyone help me to create client server chatting using php?

error follows:
The email was sent.
Warning: fopen(C://Program Files/xampp/htdocs/samplemuthu) [function.fopen]: failed to open stream: Permission denied in C:\Program...

i want to attach multifile with a mail.any one help me if u know the coding?

php mailing not working. any help me?


i used the code to send mail is as follows:
<?php
$to = "someone@example.com";
$subject = "Test mail";
$message = "Hello! This is a simple email...