clearInterwikiCache.php

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<?php
require_once __DIR__ . '/Maintenance.php';
 
class ClearInterwikiCache extends Maintenance {
 
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Clear all interwiki links for all languages from the cache' );
    }
 
    public function execute() {
        global $wgLocalDatabases, $wgMemc;
        $dbr = $this->getDB( DB_REPLICA );
        $res = $dbr->select( 'interwiki', [ 'iw_prefix' ], '', __METHOD__ );
        $prefixes = [];
        foreach ( $res as $row ) {
            $prefixes[] = $row->iw_prefix;
        }
 
        foreach ( $wgLocalDatabases as $wikiId ) {
            $this->output( "$wikiId..." );
            foreach ( $prefixes as $prefix ) {
                $wgMemc->delete( "$wikiId:interwiki:$prefix" );
            }
            $this->output( "done\n" );
        }
    }
}
 
$maintClass = ClearInterwikiCache::class;
require_once RUN_MAINTENANCE_IF_MAIN;