在HTML文档中查找具有特定类的所有div

Question

Using PHP, how can I extract all <div class="this"> even though it appears on different hierarchical levels in a HTML document?

<h3>Hello</h3>
<p>World</p>
<div class="this">
    (lots of random markup, including other divs)
</div>
<div class="this">
    (more random markup, including other divs)
</div>
<div class="inside">
    <div class="this">
        (even more random markup, including other divs)
    </div>
</div>
<p>Bye.</p>

If it's not possible to achieve with regular expressions, does PHP have a built-in library that makes it easy to do something like this (pseudo-code)?

$result = find_all($html, "div", "this");

Desired result:

$result = array(
'<div class="this">
    (lots of random markup, including other divs)
</div>',
'<div class="this">
    (more random markup, including other divs)
</div>',
'<div class="this">
    (even more random markup, including other divs)
</div>',
);

Answer 1

You can use PHP Simple HTML DOM Parser for your work , your code is something like below lines :

    <?php
include_once "simple_html_dom.php";

$html = str_get_html('<h3>Hello</h3><p>World</p><div class="this"> (lots of random markup, including other divs)</div><div class="this"> (more random markup, including other divs)</div><div class="inside"> <div class="this"> (even more random markup, including other divs) </div></div><p>Bye.</p>');

$divs = $html->find('div.this');
$ans=array();
foreach($divs as $div){
$ans[]=$div->outertext;
}

print_r($ans);


?>