TYPO3 - Index EXT:mask content with EXT:ke_search

ext_localconf.php

<?php

// register hooks for indexing additional tt_content fields
$additionContentClassName = 'VENDOR\MyCustomExtension\Hooks\KeSearchAdditionalContentFields';
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['ke_search']['modifyPageContentFields'][] = $additionContentClassName;
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['ke_search']['modifyContentFromContentElement'][] = $additionContentClassName;

KeSearchAdditionalContentFields.php

<?php
namespace VENDOR\MyCustomExtension\Hooks;

class KeSearchAdditionalContentFields {

    /**
     * add tx_mask field from tt_content table
     */
    public function modifyPageContentFields(&$fields, $pageIndexer)
    {
        $fields .= ",tx_mask_customcontent1,tx_mask_customcontent2,tx_mask_customcontent3";
    }

    /**
     *
     */
    public function modifyContentFromContentElement(string &$bodytext, array $ttContentRow, $pageIndexer)
    {
        $bodytext .= strip_tags($ttContentRow['tx_mask_customcontent1']);
        $bodytext .= strip_tags($ttContentRow['tx_mask_customcontent2']);
        $bodytext .= strip_tags($ttContentRow['tx_mask_customcontent3']);
    }

}

Thanks for sharing!