Add new column to TYPO3 functional tests CSV dataset

addNewColumnToDataset.php

<?php
    /**
     * @cli
     */
    public function addl18noriguidToDatasetsCommand()
    {
        $column = 'l10n_origuid';
        $startPath = 'typo3/sysext/core/Tests/Functional/DataHandling/Regular/';
        $absStartPath = PATH_site . $startPath;
        $Directory = new \RecursiveDirectoryIterator($absStartPath);
        $Iterator = new \RecursiveIteratorIterator($Directory);
        $Regex = new \RegexIterator($Iterator, '/^.+\.csv$/i', \RecursiveRegexIterator::GET_MATCH);

        $tablesToProcess = [
//            'pages' => 'deleted',
            'tt_content' => 'l18n_parent',
//            'sys_category' => 'l10n_parent',
//            'tx_irretutorial_1ncsv_hotel' => 'l18n_parent',
//            'tx_irretutorial_1ncsv_offer' => 'l18n_parent',
//            'tx_irretutorial_1ncsv_price' => 'l18n_parent',
//            'tx_irretutorial_1nff_hotel' => 'l18n_parent',
//            'tx_irretutorial_1nff_offer' => 'l18n_parent',
//            'tx_irretutorial_1nff_price' => 'l18n_parent',
//            'tx_testdatahandler_element' => 'l10n_parent',
//            'sys_file_reference' => 'l10n_parent',


        ];
        foreach ($Regex as $file) {
            $filePath = $file[0];
            $dataSet = DataSet::read($filePath);

            foreach ($tablesToProcess as $table => $columnAfter) {
                if (isset($dataSet->data[$table]['fields'])) {
                    //do not add the column twice
                    if (isset($dataSet->data[$table]['fields'][$column])) {
                        continue;
                    }
                    $dataSet->data[$table]['fields'] = $this->insertAfterValue($dataSet->data[$table]['fields'], $columnAfter, $column);
                    foreach ($dataSet->data[$table]['elements'] as $uid => $row) {
                        $l10nOrigUidValue = isset($row['l10n_parent']) && intval($row['l10n_parent']) > 0 ? $row['l10n_parent'] : "0";
                        $l10nOrigUidValue = $l10nOrigUidValue > 0 && isset($row['l18n_parent']) && intval($row['l18n_parent']) > 0 ? $row['l18n_parent'] : "0";
                        $dataSet->data[$table]['elements'][$uid] = $this->insertAfterKey($row, $columnAfter, $column, $l10nOrigUidValue);
                    }
                }
            }
            $dataSet->persist($filePath);
        }
    }

   function insertAfterValue($array, $after, $val)
   {
       $new = array();
       foreach ($array as $item) {
           $new[] = $item;
           if ($item == $after) {
               $new[] = $val;
           }
       }
       return $new;
   }
   function insertAfterKey($array, $after, $newKey, $val)
   {
       $new = array();
       foreach ($array as $key => $item) {
           $new[$key] = $item;
           if ($key == $after) {
               $new[$newKey] = $val;
           }
       }
       return $new;
   }