SplitProcessor.php

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<?php
namespace TYPO3\CMS\Frontend\DataProcessing;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3\CMS\Frontend\ContentObject\DataProcessorInterface;

class SplitProcessor implements DataProcessorInterface
{
    public function process(ContentObjectRenderer $cObj, array $contentObjectConfiguration, array $processorConfiguration, array $processedData)
    {
        if (isset($processorConfiguration['if.']) && !$cObj->checkIf($processorConfiguration['if.'])) {
            return $processedData;
        }

        // The field name to process
        $fieldName = $cObj->stdWrapValue('fieldName', $processorConfiguration);
        if (empty($fieldName)) {
            return $processedData;
        }

        $originalValue = $cObj->data[$fieldName];

        // Set the target variable
        $targetVariableName = $cObj->stdWrapValue('as', $processorConfiguration, $fieldName);

        // Set the delimiter which is "LF" by default
        $delimiter = $cObj->stdWrapValue('delimiter', $processorConfiguration, LF);

        // Filter integers
        $filterIntegers = (bool)$cObj->stdWrapValue('filterIntegers', $processorConfiguration, false);

        // Filter unique
        $filterUnique = (bool)$cObj->stdWrapValue('filterUnique', $processorConfiguration, false);

        // Remove empty entries
        $removeEmptyEntries = (bool)$cObj->stdWrapValue('removeEmptyEntries', $processorConfiguration, false);

        if ($filterIntegers === true) {
            $processedData[$targetVariableName] = GeneralUtility::intExplode($delimiter, $originalValue, $removeEmptyEntries);
        } else {
            $processedData[$targetVariableName] = GeneralUtility::trimExplode($delimiter, $originalValue, $removeEmptyEntries);
        }

        if ($filterUnique === true) {
            $processedData[$targetVariableName] = array_unique($processedData[$targetVariableName]);
        }

        return $processedData;
    }
}