Online PHP editor | output for 46Hra

@ 2020-09-13T14:43:42Z

<?php

$content = '
<img alt="this is super nice image with lable 4" src="5.jpg" style="height:560px; width:840px">
<img alt="Description 2" src="1.jpg" style="height:560px; width:840px" class="dupa" data-label-class="label-class">
<img src="1.jpg" style="height:560px; width:840px" class="dupa" data-label-class="label-class">
';

$content = html_entity_decode($content, ENT_QUOTES, 'UTF-8');

$doc = new DOMDocument();
$doc->loadHTML($content);
$tags = $doc->getElementsByTagName('img');

foreach ($tags as $tag) {
    // get value of an attribute
    $alt = $tag->getAttribute('alt');

    if (!empty($alt)) {
        $class = $tag->getAttribute('class');
        if (!empty($class)) {
            $class .= " picla";
        } else {
            $class = "picla";
        }
        $tag->setAttribute('class', $class);
    }
}

$content = $doc->saveHTML();

echo $content;

Output for 8.0.30, 8.1.22 - 8.1.31, 8.2.9 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html><body><img alt="this is super nice image with lable 4" src="5.jpg" style="height:560px; width:840px" class="picla"> <img alt="Description 2" src="1.jpg" style="height:560px; width:840px" class="dupa picla" data-label-class="label-class"> <img src="1.jpg" style="height:560px; width:840px" class="dupa" data-label-class="label-class"> </body></html>
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.29, 8.1.0 - 8.1.21, 8.2.0 - 8.2.8: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html><body><img alt="this is super nice image with lable 4" src="5.jpg" style="height:560px; width:840px" class="picla"><img alt="Description 2" src="1.jpg" style="height:560px; width:840px" class="dupa picla" data-label-class="label-class"><img src="1.jpg" style="height:560px; width:840px" class="dupa" data-label-class="label-class"></body></html>

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