Server error

I have php code when implemented show me this message

[B] Network Error (tcp_error)

A communication error occurred: “Operation timed out”
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests[/B]
Use Linux Debian
What’s wrong?
Do error from the server or the code?

Hi
From what the error says

Network Error (tcp_error)
A communication error occurred: "Operation timed out"

I think the problem is from the script code, taking a long time to processes data.
Try with a code that outputs a simple data. If the errors occurs again, the problem can be from server.