How to cut out everything unnecessary from a tag in PHP?

Question

PHP

Help with regex, how to strip all content from a div and leave only the style tag
Example:

<div onclick="alert('Hello')" style="color:#ff0000;">текст</div>
<div onclick="alert('Hello')">текст</div>
<div style="color:#ff0000;" onclick="alert('Hello')">текст</div>
<div style="color:#ff0000;">текст</div>

Need to get

<div style="color:#ff0000;">текст</div>
<div>текст</div>
<div style="color:#ff0000;" >текст</div>
<div style="color:#ff0000;"></div>

Stuck at this stage.

Answer 1

Not cut, but reassembled =)

<?php

$HTMLCode = <<< HTML
<div onclick="alert('Hello')" style="color:#ff0000;">текст1</div>
<div onclick="alert('Hello')">текст2</div>
<div style="color:#ff0000;" onclick="alert('Hello')">текст3</div>
<div style="color:#ff0000;">текст4</div>
HTML;

$HTMLCode = mb_convert_encoding($HTMLCode, 'HTML-ENTITIES', "UTF-8");

$dom = new DomDocument();
$dom->loadHTML( $HTMLCode );
$xpath = new DomXPath( $dom );

$_res = $xpath->query(".//div");

foreach($_res as $div){
  $style = $div->getAttribute('style') ? ' style="'.$div->getAttribute('style').'"' : '';
    echo '<div'.$style.'>'.$div->textContent.'</div>';
}

Answer 2

I suggest looking towards the HTML Purifier library. For these purposes, he
htmlpurifier.org

Answer 3

Better all the same, not a regular expression, but a parser.

Answer 4

+ better parser

Answer 5

For php, a good static content parser is simple_html_dom