ShuffleViewHelper

Index.html

{namespace ve=Vendor\Extension\ViewHelpers}

<f:for each="{yourArray -> ve:shuffle(limit:3)}" as="item">
  {item.name}
</f:for>

ShuffleViewHelper.php

<?php
  namespace Vendor\Extension\ViewHelpers;
  
  class ShuffleViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {

    /**
     * @param mixed  $subject     array to randomize.
     * @param int    $limit       If > 0 then array is sliced
     *
     * @return array shuffled and sliced array
     */
    public function render($subject = NULL, $limit = 0) {
      if ($subject === NULL) {
        $subject = $this->renderChildren();
      }

      if ( is_array($subject) ) shuffle($subject);
      if ( is_array($subject) && $limit > 0 ) $subject = array_slice($subject, 0, $limit)
      
      return $subject;
    }
  }