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@ 2017-03-31T15:04:18Z

<?php
$content = <<<EOT
<p>List of sample images.</p>
<img src="https://placehold.it/250x100/99cc00/000.jpg?text=JPG" alt="JPG" /><br>
<img src="https://placehold.it/250x100.gif?text=GIF" alt="GIF" /><br>
<img src="https://placehold.it/250x100/ff6600/000.png?text=PNG" alt="PNG" /><br>
<img class="no-ext" src="https://placehold.it/350x150?text=No Extension" alt="No Ext" /><br>
<img src="https://placehold.it/250x100.png" custom-attr="custom1" another-attr="custom2" /><br>
<img class="svg" src="https://upload.wikimedia.org/wikipedia/commons/0/02/SVG_logo.svg" alt="SVG" /><br>
<img class="webp" src="https://gstatic.com/webp/gallery/1.webp" width="100" alt="webP" /><br>
EOT;
# Find all content with <img> tags
preg_match_all( '/(?:<img|(?<!^)\G)\h*([-\w]+)="([^"]+)"(?=.*?\/>)/', $content, $images );
foreach ( $images[1] as $attributes[1] => $value ) {
    echo( '< img ' . $value . '="' . 'value' . '" ><br>' );
}
//echo "<pre>"; print_r($images);
$temp = array();
foreach($images[0] as $key=>$img){    
    $pos = strpos($img,'<img');
    if($pos === false){
        $temp[$key_2][] = $img;
    }else{
        $temp[$key][] = $img;
        $key_2 = $key;
    }
}
foreach($temp as $k=>$v){
    $str[] = implode(' ', $v) . ' />';
}

$finalStr = implode('<br />', $str);

echo $finalStr;

Output for git.master, git.master_jit, rfc.property-hooks: < img src="value" ><br>< img alt="value" ><br>< img src="value" ><br>< img alt="value" ><br>< img src="value" ><br>< img alt="value" ><br>< img class="value" ><br>< img src="value" ><br>< img alt="value" ><br>< img src="value" ><br>< img custom-attr="value" ><br>< img another-attr="value" ><br>< img class="value" ><br>< img src="value" ><br>< img alt="value" ><br>< img class="value" ><br>< img src="value" ><br>< img width="value" ><br>< img alt="value" ><br><img src="https://placehold.it/250x100/99cc00/000.jpg?text=JPG" alt="JPG" /><br /><img src="https://placehold.it/250x100.gif?text=GIF" alt="GIF" /><br /><img src="https://placehold.it/250x100/ff6600/000.png?text=PNG" alt="PNG" /><br /><img class="no-ext" src="https://placehold.it/350x150?text=No Extension" alt="No Ext" /><br /><img src="https://placehold.it/250x100.png" custom-attr="custom1" another-attr="custom2" /><br /><img class="svg" src="https://upload.wikimedia.org/wikipedia/commons/0/02/SVG_logo.svg" alt="SVG" /><br /><img class="webp" src="https://gstatic.com/webp/gallery/1.webp" width="100" alt="webP" />

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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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