Question

I want remove some div with id or class which contain words comment or share (like:<div id="comment">, <div class="header-comment">, <div id="comment-footer">, <div class="social-share">), something I use

preg_replace('/<div[^>]*(comment|share)[^>]*>(.*?)<\/div>/is', '', $htmls);

Not work. How to do a right regex? Here is some test code, I want to remove comment part and keep content and footer,

$htmls = <<<EOT
<div id="content">
     Main content.
</div>
<div id="comment">
    <ul>
        <li class="comment">
            <div class="header-comment">
                Comment:
                <span class="date-comment">8/11/2012, 21:25</span>
            </div>
            <h4>Some Text</h4>
            <p class="test-comment">Blah~~ Blah~~ Blah~~</p>
            <div class="share">
                <div class="vote">
                    <a class="vota yes" title="Like">2</a>
                    <a class="vota no" title="Unlike">0</a>
                </div>
            </div>
        </li>
        <li class="comment">
            <div class="header-comment">
                Comment:
                <span class="date-comment">8/11/2012, 23:08</span>
            </div>
            <h4>Other Text</h4>
            <p class="test-comment">Blah~~ Blah~~ Blah~~</p>
            <div class="share">
                <div class="vote">
                    <a class="vota yes" title="Like">4</a>
                    <a class="vota no" title="Unlike">0</a>
                </div>
            </div>
        </li>     
     </ul>
</div>
<div id="footer">
     Footer content.
</div>
EOT;

$htmls = preg_replace('/<div[^>]*(comment|share)[^>]*>(.*?)<\/div>/is', '', $htmls);
echo $htmls;

Answer 1

What i think you should use is DomDocument try :

$dom = new DOMDocument();
$dom->loadHTML($htmls);
$remove = array("comment","share");
$removeList = array();
foreach ( $dom->getElementsByTagName("div") as $div ) {
    if (in_array($div->getAttribute("class"), $remove) || in_array($div->getAttribute("id"), $remove)) {
        $removeList[] = $div;
    }
}

foreach ( $removeList as $div ) {
    $div->parentNode->removeChild($div);
}

$dom->formatOutput = true;
echo "<pre>";
echo htmlentities($dom->saveHTML());