TYPO3 Core

if (count($relatedRecords['records']) > 1

&& isset($GLOBALS['TCA'][$table]['columns'][$field]['config']['foreign_sortby'])

) {

$sortField = $GLOBALS['TCA'][$table]['columns'][$field]['config']['foreign_sortby'];

usort($relatedRecords['records'], function (array $a, array $b) use ($sortField) {

return $a[$sortField] > $b[$sortField];

});

}