>I am writing a PHP script to test if the server on which it is running is
>currently connected to the Internet. If so, the main page will display a
>notice saying "We are now online", else it will say "Not connected"
>
>Any ideas on how to do this with PHP? I'm guessing it would involve some
>kind of socket connection...
Yep. Simply open a socket connection as described in:
http://www.php.net/manual/en/function.fsockopen.php
I once wrote an RTSP (Real Time Streaming Protocol) link checker using that, works
flawlessly.
$sockethandle = fsockopen($host, $port);
if ($sockethandle) {
# Lets query document root
$query = "GET / HTTP/1.0\n\n";
# Send the query
fputs($sockethandle, $query);
# Receive first line of response
$response = trim(fgets($sockethandle, 1024));
}
Remember, using fsockopen is more or less like telnet-ing to the server, standard HTTP
port is 80. But querying a web server can easier be done by doing a
file($url_of_server).
If it's just to tell if a server is online, nearly any method will do, including DNS
lookups or a simple system call with ping... :-)
mit freundlichen Gruessen / yours sincerely
Gunther E. Biernat
Web Application Engineer
______________________________________________________________
RealNetworks GmbH Tel.: +49-40-415204-24
Weidestraße 128 Fax.: +49-40-415204-11
22083 Hamburg Mail: [EMAIL PROTECTED]
Germany URL : http://de.real.com
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