下面是如何通过临时对WP代码进行一次小修正来完成的：

将zip文件上载到WP的根文件夹，与wp-config.php 还有朋友打开文件wp-admin\\includes\\update.php.find_core_update, 并将其更改为：

function find_core_update( $version, $locale ) {
    $updates = get_core_updates();
    return $updates[0];
}

function get_core_updates( $options = array() ) {
    $new_zip = \'wordpress-4.3.1.zip\';
    $new_version = \'4.3.1\';
    return array((object)array(
        \'response\'      => \'upgrade\',
        \'current\'       => $new_version,
        \'download\'      => \'../\' . $new_zip,
        \'packages\'      => (object) array (
                            \'partial\' => null,
                            \'new_bundled\' => null,
                            \'no_content\' => null,
                            \'full\' => \'../\' . $new_zip,
                        ),
        \'version\' => $new_version,
        \'locale\' => null
    ));
}

进入管理面板并运行更新！