MediaWikiExtensionMessageGroup.php

<?php
declare( strict_types = 1 );
 
class MediaWikiExtensionMessageGroup extends FileBasedMessageGroup {
    public function getDescription( IContextSource $context = null ) {
        $language = $this->getSourceLanguage();
        if ( $context ) {
            $language = $context->getLanguage()->getCode();
        }
 
        $msgkey = $this->getFromConf( 'BASIC', 'descriptionmsg' );
        $desc = '';
        if ( $msgkey ) {
            $desc = $this->getMessage( $msgkey, $language );
            if ( (string)$desc === '' ) {
                $desc = $this->getMessage( $msgkey, $this->getSourceLanguage() );
            }
        }
 
        if ( (string)$desc === '' ) {
            // That failed, default to 'description'
            $desc = parent::getDescription( $context );
        }
 
        return $desc;
    }
}