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tdebatty/get_ip.php

Last active May 12, 2022 08:26
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PHP : Get IP from interface
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get_ip.php
// !! this gist was created in 2015, it doesn't work on most modern distributions !!
// e.g: get_ip("eth0");
function get_ip($interface) {
$interface = escapeshellarg($interface);
$pattern = "/inet addr:(\d+\.\d+\.\d+\.\d+)/";
$text = shell_exec("ifconfig $interface");
preg_match($pattern, $text, $matches);
return $matches[1];
}
@AlexNodex
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AlexNodex commented May 11, 2022

You've got a typo...

$text = shell_exec("ifconfig $internface"); <---- $interface not $internface!

@tdebatty
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tdebatty commented May 12, 2022

Fixed, thanks @AlexNodex !

@AlexNodex
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AlexNodex commented May 12, 2022

Newer systems won't work with your regex either

$pattern = "/inet (?:addr\:)?(\d+\.\d+\.\d+\.\d+)/";

this will allow an optional addr: part which newer flavours of Ubuntu (and probably others) leave out of the ifconfig command

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