RE: Re: How to find out if PC is online

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Yes, you are wrong. 

-----Original Message-----
From: SolidDigital
To: php-windows@lists.php.net
Sent: 2003-12-01 20:10
Subject: Re:  Re: How to find out if PC is online

What i meant to say was if gethostbyaddr(ipadress) responds with 
something else than the ipadress then this PC must be online.

Or am I wrong??

Jocjem



B.A.T. Svensson wrote:
> And precisly how does the mechnaism with gethostbyaddr(),
> e.g. an DNS request, work to be able to resolve the issue
> about weather a particular host i online or not? 
> 
> As far as I know this is not possible. The only thing one might
> be able to say after a successfull DNS look up is this-or-that
> host has a registered entry in the DNS server. Nothing more can
> be deduced.
> 
> If I messed something here, please fill me in.
> 
> -----Original Message-----
> From: J.Veenhuijsen
> To: php-windows@lists.php.net
> Sent: 2003-12-01 12:53
> Subject:  Re: How to find out if PC is online
> 
> Try :
> 
> gethostbyaddr (PHP 3, PHP 4 )
> Get the Internet host name corresponding to a given IP address
> string gethostbyaddr (string ip_address)
> Returns the host name of the Internet host specified by ip_address. If

> an error occurs, eturns
> ip_address.
> See also gethostbyname().
> 
> Jochem
> 
> Jan Hrebenar wrote:
> 
>>Hello All,
>>
>>I`d like to make script which will detect
>>if my computer at IP xxx.xxx.xxx.xxx is online.
>>I try to use system("ping") but this function
>>is not allowed on server.
>>
>>Can somebody tell me if exist any other way
>>to do this?
>>
>>Pls excuse my english
> 
> 

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