如何从html页面获取文本链接？ [重复]

Question

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• How do you parse and process HTML/XML in PHP? 30 answers

I want to get the links "http://www.w3schools.com/default.asp" & "http://www.google.com" from this webpage.I want the links of <a> tags inside <div class="link">,there are many other <a> tags in this page and I don't want them. How can I retrieve the particular links only? Can anyone help me?

<div class="link">
<a href="http://www.w3schools.com/default.asp">
<h4>W3 Schools</h4>
</a>
</div>
<div class="link">
<a href="http://www.google.com">
<h4>Google</h4>
</a>
</div>

</div>

Answer 1

Use a DOM Parser such as DOMDocument to achieve this:

$dom = new DOMDocument;
$dom->loadHTML($html); // $html is a string containing the HTML

foreach ($dom->getElementsByTagName('a') as $link) {
    echo $link->getAttribute('href').'<br/>';
}

Output:

http://www.w3schools.com/default.asp
http://www.google.com

Demo.

---

UPDATE: If you only want the links inside the specific <div>, you can use an XPath expression to find the links inside the div, and then loop through them to get the href attribute:

$dom = new DOMDocument;
$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$links_inside_div = $xpath->query("//*[contains(@class, 'link')]/a");

foreach ($links_inside_div as $link) {
    echo $link->getAttribute('href').'<br/>';
}

Demo.