TYPO3 Fluid ViewHelper for content element "shortcut"

ReferenceViewHelper.php

<?php
namespace NAMESPACE\ThemeMgCustom\ViewHelpers;

/*
 *
 *  Copyright notice
 *
 *  (c) 2015 Claus Fassing <[email protected]>, MEDIENGARAGE
 *
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *
 *  This script is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 */

/**
 * <mg:Reference records="{panel.records}" field="header" />
 * records = record ids, field = table field
 *
 * @author Claus Fassing <[email protected]>
 */
class ReferenceViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper
{
    /**
     *
     * @var \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface
     */
    protected $configurationManager;

    /**
     *
     * @var \TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer
     */
    protected $cObj;

    /**
     * Inject configuration manager and get content object
     *
     * @param \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface $configurationManager
     */
    public function injectConfigurationManager(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface $configurationManager)
    {
        $this->configurationManager = $configurationManager;
        $this->cObj                 = $this->configurationManager->getContentObject();
    }

    /**
     * Get content object of ce type 'shortcut'. Only return the field value
     *
     * @param string $records
     * @param string $field
     * @return string
     */
    public function render($records, $field)
    {
        $recordList = explode(',', $records);
        for($i=0;$i < count($recordList);$i++) {
            $uids .= end(explode('_', $recordList[$i]));
            if($i < count($recordList) - 1) {
                $uids .= ',';
            }
        }

        $conf = array(
            'table' => 'tt_content',
            'select.' => array(
                'pidInList' => '0',
                'uidInList' => $uids,
            ),
            'renderObj' => 'COA',
            'renderObj.' => array(
                '10' => 'TEXT',
                '10.' => array(
                    'field' => $field
                )
            )
        );

        $content = $this->cObj->cObjGetSingle('CONTENT', $conf);

        return $content;
    }
}

Nice ViewHelper, but I would change three things:

1. In line 69 change explode to GeneralUtility::trimExplode(',', $records, true). All empty value would be removed.
2. In line 71 change explode to GeneralUtility::intExplode('_', $recordList[$i], true). All empty value would be removed and the values in $recordsList[$i] would be parse to an integer value
3. Line 71 add the string comma to $uids at the end (e.g. $uids = GeneralUtility::intExplode('_', $recordList[$i], true) . ','; ) and remove line 72, 73 and 74. After the for-loop add $uids = rtrim($uids, ',') to remove the last comma.

The change of the explode function gives more security and the third thing a little more speed.