下面是函数

function getSitesLanguages() {
    $blog_languages = array();
    global $wpdb;
    $sites = get_sites();
    foreach ( $sites as $key => $site ) {
        $blog_languages[ $site->blog_id ] = \'\';
        $blog_id                           = $site->blog_id . \'_\';
        if ( $blog_id == 1 ) {
            $blog_id = \'\';
        }
        $QUERY  = $wpdb->prepare( \'SELECT code FROM \' . $wpdb->base_prefix . $blog_id . \'icl_languages WHERE active =  %d\', 1 ).PHP_EOL;
        $result = $wpdb->get_results( $QUERY );
        if ( ! empty( $result ) ) {
            foreach ( $result as $key2 => $langObj ) {
                $blog_languages[ $site->blog_id ][] = $langObj->code;
            }
        }
    }

    return $blog_languages;
}