PHP - Strings - Remove a HTML tag with a specific class, including its contents

Question

I have a string like this:

<div class="container">
  <h3 class="hdr"> Text </h3>
  <div class="main">
    text
    <h3> text... </h3>
    ....

  </div>
</div>

how do I remove the H3 tag with the .hdr class using as little code as possible ?

Answer 1

Using as little code as possible? Shortest code isn't necessarily best. However, if your HTML h3 tag always looks like that, this should suffice:

$html = preg_replace('#<h3 class="hdr">(.*?)</h3>#', '', $html);

Generally speaking, using regex for parsing HTML isn't a particularly good idea though.

Answer 2

Something like this is what you're looking for...

$output = preg_replace("#<h3 class=\"hdr\">(.*?)</h3>#is", "", $input);

Use "is" at the end of the regex because it will cause it to be case insensitive which is more flexible.