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@ 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 git.master, git.master_jit, rfc.property-hooks: <!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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Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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