public function execute() {
global $wgLocalDatabases, $wgMemc;
public function execute() {
global $wgLocalDatabases, $wgMemc;
$res = $dbr->select( 'interwiki', [ 'iw_prefix' ], false );
$prefixes = [];
foreach ( $res as $row ) {
$res = $dbr->select( 'interwiki', [ 'iw_prefix' ], false );
$prefixes = [];
foreach ( $res as $row ) {