preg_replace_callback.php

<?php
$oldString ='version 4.4.6 ( updated 05-08-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.

version 4.4.5 ( updated 05-01-2020 )
- Improved logic to keep collapse/expand state consistent for Add/Clone/Delete/DnD actions in Layers panel.
- Updated Layers panel to allow selecting Goal and Winner for Split Testing from Layers panel.
- Improved the Visual Builder scroll performance.
- Added vmin and vmax to css allowed units in module settings.';

$newString = preg_replace_callback('(version [0-9].[0-9].[0-9][0-9]?)', function($matches){return 'myUnlikelyDelimiter'.$matches[0];}, $oldString);

$array = explode('myUnlikelyDelimiter', $newString);

var_dump($array);

echo '<br><br>';

$oldString ='
<!--part_name:PartName11-->
Description of the part etc...
<br>
<!--part_name:PartName22-->
Description of the next part etc...
<br>
<!--part_name:PartName33-->
Description of the last part etc...
<br>
';

function unComment ($matches){
    $visible = str_replace('<!--', '', $matches[0]);
    $visible = str_replace('-->', '', $visible);
    return $visible;
}

$newString = preg_replace_callback('#<!--part_name:(.*?)-->#', 'unComment', $oldString);

echo '<p>'.$newString.'</p>';


echo '<br><br>';

    $oldString = htmlspecialchars('<script type="text/javascript" src="/many/parents/path/file.js?version=c0af26a3543415d554bae1b8de55874b7736071d"></script>');

    $newString = preg_replace_callback('#(src=&quot;)(/?)(\w*/)+([\w\d]*)(.js|.css)(\?version=)([\w\d]*)#', function($matches){return $matches[1].'/new/dir/'.$matches[4].$matches[5];}, $oldString);

    echo $newString;

echo '<br><br>';

echo 'oldString: '.$oldString;
echo '<br>';
echo 'newString: '.$newString;

echo '<br><br>';

?>