V novo vytvorenom extensione najprv vytvoríme triedu, ktorá sa bude starať o vymazanie session záznamu:

<?php

class tx_fesessiondelete {

function sessionDelete( $params, $that ) {

	if( $that->loginType == 'FE' )
		$loginData = $that->getLoginFormData();

	if( $that->session_table == 'fe_sessions' && $that->id && $loginData['status'] == 'logout' ) {
		$query = 'DELETE FROM fe_session_data 
			WHERE hash = \''.$that->id.'\'
			LIMIT 1';
		$res = mysql( TYPO3_db, $query );
	}
}

} // end class tx_fesessiondelete

?>

Potom nastavíme jej spúšťanie pri odhlasovaní FE usera v localconf.php:

// Paste to localconf.php
// FE service module, robert
require_once(t3lib_extMgm::extPath('m_products').'class.tx_fesessiondelete.php');
	$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_userauth.php']['logoff_pre_processing'][] = 'tx_fesessiondelete->sessionDelete';