RE: [PHP] Checking for internet connection.
| From: | Bob McConnell | Date: | Tue, 22 Dec 2009 13:27:39 +0000 |
| Subject: | RE: [PHP] Checking for internet connection. | ||
| References: | 1 2 3 4 5 6 7 8 9 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-300629@lists.php.net to get a copy of this message | ||
From: Andy Shellam
>>
>> Both at home and at work there are caching DNS on the LAN. So a DNS
>> request may come back with a valid IP address when the WAN connection
is
>> down. I still won't be able to connect to the remote site.
>
> Dig an external server - e.g. dig @a.root-servers.net google.co.uk
>
> If your net is down the query will fail even if the reply is
> cached locally, because you're specifically requesting a response
> from a.root-servers.net.
What means dig? I can't find it in the function index of the online
manual.
Bob McConnell