Gethostbyaddr

[Pensive]

I piggy back on another domain and when they switched to Dreamhost, they had to change how my website was handled. It went from www.xxx.com/mywebsite to mywebsite.xxx.com. As a result of this the gethostbyaddr command in one of my web pages generates the following error:

 

Warning: gethostbyaddr() [function.gethostbyaddr]: Address is not a valid IPv4 or IPv6 address

 

Does anybody have any suggestions as to a solution.

 

Thanks.

 

[pocobueno1388]

Sometimes when using $_SERVER['HTTP_X_FORWARDED_FOR'] OR $_SERVER['REMOTE_ADDR'] more than 1 IP address is returned, for example '155.240.132.261, 196.250.25.120'. When this string is passed as an argument for gethostbyaddr() PHP gives the following error: Warning: Address is not a valid IPv4 or IPv6 address in...

 

To work around this I use the following code to extract the first IP address from the string and discard the rest. (If you wish to use the other IPs they will be in the other elements of the $ips array).

 

if (strstr($remoteIP, ', ')) {

    $ips = explode(', ', $remoteIP);

    $remoteIP = $ips[0];

}

 

Hope this helps someone

 

Came from this page:

http://php.net/function.gethostbyaddr