Re: [PHP] Checking if a host is online
From: Jacob_at_Keystreams.Com (jacob_at_keystreams.com)
Date: 11/30/03
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Date: Sat, 29 Nov 2003 17:10:22 -0700
This may be OT but have you looked at Netsaint (http://www.netsaint.org/ and http://www.netsaint.org/indexold.php), now called Nagios
(http://www.nagios.org/) by the looks of it. Note: It's not written in PHP from what I remember. You may be able to get some ideas from it or even use
it. I've used it in the past to monitor a small web cluster and it worked nicely. Additionally, freshmeat has a bunch of network monitors listed
written in PHP.
Jason Giangrande wrote:
> I'm creating an application for an Intranet that, among other things, is
> supposed to check to see if particular hosts are online, and if so, what
> their IP address is. Anyone know how I can accomplish this? I tried
> using exec("host $host"); (where $host is the hostname) and while this
> gets the IP it gets the IP address sometimes even if the host is not
> active, because a DNS record for the system still exists. I also looked
> into the gethostbyname() function, but that has similar problems to
> using the external host command. I also tried to use an external ping
> command (ping -c 1 $host), and while I could get that to work, since it
> returns non-zero status if the host can not be contacted, it takes quite
> a while to execute for even a few hosts at once.
>
> Anyone ever do this king=d of thing before or have any suggestions on
> what might work?
-- "No, mon, let's go home to Jamaica. I and I been in Babylon too long." -- Homer Simpson
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