extract ip address from string

Question

I have following string an want to exctract the ip-address:

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            <span class="label label-info"><a href="/ip-adresse/">IP-Adresse (IPv4)</a></span><strong class="ip">176.<wbr>199.<wbr>114.<wbr>9</strong>
                <span class="label label-hostname"><a href="/hostname/">Hostname</a></span><span class="hostname">ip-<wbr>176-<wbr>199-<wbr>114-<wbr>9.<wbr>hsi06.<wbr>unitymediagroup.<wbr>de</span>
                <br>        <span class="label label-hostname"><a href="/whois/">Whois</a></span><span class="whois">Unitymedia dynamic customer IP pool (Unitymedia Group)</span>
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i want to extract that:

176.<wbr>199.<wbr>114.<wbr>9

in a string in this format: 176.199.114.9

i have tried it with:

preg_match_all("/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}.\d{1,3}.\d{1,3}/",$result,$ip);
echo $ip;

and my output just

Array

what have you tried ? what is the output of `$result` ? How are we supposed to know ? — Vasil Rashkov, Mar 18 '16 at 10:29
print_r($ip) is: Array ( [0] => Array ( ) ) and var_dump($ip): array(1) { [0]=> array(0) { } } — swapfile, Mar 18 '16 at 10:50
Regex is not the correct tool for parsing `HTML/XML` instead you can use `DOMDocument` — Narendrasingh Sisodia, Mar 18 '16 at 10:56

score 2 · Accepted Answer · answered Mar 18 '16 at 10:52

2

if you get to a point where you have the IP mixed with a couple of tags, you could simple appy the php function strip_tags() to it:

$ip = "176.<wbr>199.<wbr>114.<wbr>9";
$cleanIp = strip_tags($ip); //output 176.199.114.9

answered Mar 18 '16 at 10:52

Vinicius Barros

91
5

JanC · Answer 2 · 2016-03-18T11:42:56.233

1

Try the regex: (\d*).<wbr>(\d*).<wbr>(\d*).<wbr>(\d*)

preg_match_all("/(\d*).<wbr>(\d*).<wbr>(\d*).<wbr>(\d*)/",$result,$ip);
print_r($ip);

Update I assume there will only be one IP on the site (i.e., the one you want). So we can replace:

preg_match("/(\d*).<wbr>(\d*).<wbr>(\d*).<wbr>(\d*)/",$result,$ip);
$ip = join('.', array_slice($ip, 1));
echo $ip;

edited Mar 18 '16 at 11:42

answered Mar 18 '16 at 10:49

JanC

345
1
6

Thx, works nealry perfect... but output now is: Array ( [0] => 176.199.114.9 [1] => 176 [2] => 199 [3] => 114 [4] => 9 ) a little too much – swapfile Mar 18 '16 at 11:09
THX, thats works perfect! – swapfile Mar 18 '16 at 12:16

score 1 · Answer 3 · answered Mar 18 '16 at 11:10

1

It would be much more convenient with a DOM parser, there may be some warnings related to your wbr tags

$r = YOUR_HTML_CONTENT
$doc = new DOMDocument();
$doc->loadHTML($r, LIBXML_NOWARNING);

$xpath = new DOMXpath($doc);
$class = $xpath->query("//*[contains(concat(' ', normalize-space(@class), '   '), ' ip ')]");
foreach($class as $item) { // DOMElement Object
 echo $item->nodeValue; //176.199.114.9
}

answered Mar 18 '16 at 11:10

Vishnu Nair

2,395
14
16

Thank you, Vincent. That also works phantastic! – swapfile Mar 18 '16 at 12:56

extract ip address from string

3 Answers3