Question

我有以下字符串想要提取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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我想提取一下：

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

在此格式的字符串中：176.199.114.9

我尝试过：

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;

和我的输出只是

Array

Answer 1

如果你到达了一个IP混合了几个标签的点，你可以简单地将php函数strip_tags（）应用到它：

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

Answer 2

试用正则表达式：(\d*).<wbr>(\d*).<wbr>(\d*).<wbr>(\d*)

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

<强>更新我假设网站上只有一个IP（即你想要的那个）。所以我们可以替换：

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

Answer 3

使用DOM解析器会更方便，可能会有一些与wbr标签相关的警告

$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
}

从字符串中提取ip地址

3 个答案: