Override service registration

The priority and other values of the original service registration can be overridden in any extension's ext_localconf.php file. Example:

<?php

declare(strict_types=1);

defined('TYPO3') or die();

// Raise priority of service 'tx_example_sv1' to 110
$GLOBALS['TYPO3_CONF_VARS']['T3_SERVICES']['auth']['tx_example_sv1']['priority'] = 110;

// Disable service 'tx_example_sv1'
$GLOBALS['TYPO3_CONF_VARS']['T3_SERVICES']['auth']['tx_example_sv1']['enable'] = false;

The general syntax is:

$GLOBALS['TYPO3_CONF_VARS']['T3_SERVICES'][service type][service key][option key] = value;

Registration options are described in more details in Implementing a service. Any of these options may be overridden using the above syntax. However caution should be used depending on the options. className should not be overridden in such a way. Instead a new service should be implemented using an alternate class.