Find/Sort ALL tags (Wolf CMS)

<?php
/*
This page looks through each page of the Articles branch, and groups its pages under shared tags.
No plugin required.
It also just happens to sort alphabetically on the tag, but I didn't ask it to!
*/

function allTags() {
    global $__CMS_CONN__;
    $sql = 'SELECT name FROM '.TABLE_PREFIX.'tag';
    $arr = array();

    $stmt = $__CMS_CONN__->prepare($sql);
    $stmt->execute();
    while ($obj = $stmt->fetchObject())
        array_push($arr, $obj->name);
    return $arr;
}
/** / echo '<pre>'; print_r(allTags()); echo '</pre>'; /**/
?>

<?php $branchTags = array(); // define where you want tag-search to start
foreach ($this->find('articles')->children() as $child) {
    foreach ($child->tags() as $ctag) { array_push($branchTags, $ctag); }
}
// print_r($branchTags); ?>

<?php foreach (allTags() as $tag) : ?>
<?php if (in_array($tag, $branchTags)) : // check to see if tag is in this branch... ?>

<?php $findTag = $tag; // looping all tags in tag table... ?>
<h3>Pages with the tag "<?php echo $findTag; ?>":</h3>
<?php foreach ($this->find('articles')->children() as $child): ?>
<?php $childTags = join(',', $child->tags()); ?>
<ul>
  <?php if (preg_match("/\b".$findTag."\b/i", $childTags)) : ?>
    <li><?php echo $child->link(); ?></li>
  <?php endif; ?>
</ul>
<?php endforeach; ?>

<?php endif; endforeach; ?>