ViewHelper used to return a version number of a resource based on the MD5 hash of a file.

ResourceBuiltVersionViewHelper.php

<?php
namespace Acme\Demo\ViewHelpers;

/**
 * ResourceBuiltVersion
 *
 * ViewHelper used to return a version number of a resource based on the MD5 hash of a file.
 *
 * Useful to prevent caching issues with static resources.
 *
 * Usage:
 *
 *     <acme:resourceBuiltVersion name="resource://Acme.Demo/Public/Scripts/Build/headScripts.js" />
 *
 * Inline usage for loading a static resource:
 *
 *     <script src="resource://Acme.Demo/Public/Scripts/Build/headScripts.js?{acme:resourceBuiltVersion(name:'resource://Acme.Demo/Public/Scripts/Build/headScripts.js')}"></script>
 */
use TYPO3\Fluid\Core\ViewHelper\AbstractViewHelper;

class ResourceBuiltVersionViewHelper extends AbstractViewHelper
{

    /**
     * @param string $name
     * @return mixed
     */
    public function render($name)
    {
        if (file_exists($name)) {
            return substr(md5_file($name), 0, 12);
        }
        return false;
    }

}