Question using curl curl_setopt ($ch, CURLOPT_INTERFACE, $ipUsed);

teguh123

I understand that $ipUsed must be an IP available within the system.

If I know my server IP, I will just put it on $ipUsed.

However, if latter the program is moved to another computer I will have to change the IP used.

Is there a way to ask the server which IPs are available?

The-Master

$_SERVER['SERVER_ADDR'] returns the server ip address if that is what you are looking for.

teguh123

My server has many IP. 6. How do I know all of them?

Other servers also have several IP. How do I get an array containing all other IP?

bradgrafelman

I'm not sure if this type of information is available to PHP, meaning the only way to find out would be to execute the relative system command that displays information about the network adapter(s) installed, using PHP to parse that information for IP addresses.

EDIT: Hmm.. if your DNS server knows all of your IP's, it might be possible. What if you do something like this:

$hosts = gethostbynamel($_SERVER['SERVER_NAME']);
print_r($host);

teguh123

Cpanel itself is a PhP program. Somehow, cpanel knows all the IP used such as when we try to create a new account. Cpanel need to populate the IP dropdown list right?

teguh123

PHP Code:
$hosts = gethostbynamel($_SERVER['SERVER_NAME']);
print_r($host);

This solution only show one IP, the main one. Hmmm....

Anyway, is there a way to look the list of IP on the net? Reverse dns lookup?

bradgrafelman

teguh123 wrote:
Reverse dns lookup?

That's what (I think) [man]gethostbynamel/man does.

Like I said, I don't know of any function native to PHP that can do this (since gethostbynamel() failed), so short of executing some command to show the IP's on the NIC & parsing the output for the IP's, I have no idea.

teguh123

I am thinking of doing this automatically with PhP program.

teguh123

No longer need to do it automatically with PhP program. I just need to know what sort of IP are available from a server that enable curl.

Sort of asking the server owner, is there a way to know? phpinfo?