/**
 * The loginform
 *
 * @author   Andreas Gohr 
 *
 * @param bool $svg Whether to show svg icons in the register and resendpwd links or not
 */
function html_login($svg = false){
    global $lang;
    global $conf;
    global $ID;
    global $INPUT;
    print p_locale_xhtml('login');
    print ''.NL;
    $form = new Doku_Form(array('id' => 'dw__login', 'action'=> $ID));
    $form->startFieldset($lang['btn_login']);
    $form->addHidden('id', $ID);
    $form->addHidden('do', 'login');
    /** ここでログイン後に引継ぎたいパラメータを追加 **/
    if ($INPUT->str('test')) $form->addHidden('test', $INPUT->str('test'));
    $form->addElement(form_makeTextField(
        'u',
        ((!$INPUT->bool('http_credentials')) ? $INPUT->str('u') : ''),
        $lang['user'],
        'focus__this',
        'block')
    );
    $form->addElement(form_makePasswordField('p', $lang['pass'], '', 'block'));
    if($conf['rememberme']) {
        $form->addElement(form_makeCheckboxField('r', '1', $lang['remember'], 'remember__me', 'simple'));
    }
    $form->addElement(form_makeButton('submit', '', $lang['btn_login']));
    $form->endFieldset();
    if(actionOK('register')){
        $registerLink = (new \dokuwiki\Menu\Item\Register())->asHtmlLink('', $svg);
        $form->addElement(''.$lang['reghere'].': '. $registerLink .'
');
    }
    if (actionOK('resendpwd')) {
        $resendPwLink = (new \dokuwiki\Menu\Item\Resendpwd())->asHtmlLink('', $svg);
        $form->addElement(''.$lang['pwdforget'].': '. $resendPwLink .'
');
    }
    html_form('login', $form);
    print ''.NL;
}
 
    /**
     * Redirect to the show action, trying to jump to the previously edited section
     *
     * @triggers ACTION_SHOW_REDIRECT
     * @throws ActionAbort
     */
    public function preProcess() {
        global $PRE;
        global $TEXT;
        global $INPUT;
        global $ID;
        global $ACT;
        $opts = array(
            'id' => $ID,
            'preact' => $ACT,
            'params' => []
        );
        /** 引継ぎたい GETパラメータを指定 **/
        if ($INPUT->str('test'))  $opts['params']['test']  = $INPUT->str('test');
        //get section name when coming from section edit
        if($INPUT->has('hid')) {
            // Use explicitly transmitted header id
            $opts['fragment'] = $INPUT->str('hid');
        } else if($PRE && preg_match('/^\s*==+([^=\n]+)/', $TEXT, $match)) {
            // Fallback to old mechanism
            $check = false; //Byref
            $opts['fragment'] = sectionID($match[0], $check);
        }
        // execute the redirect
        Event::createAndTrigger('ACTION_SHOW_REDIRECT', $opts, array($this, 'redirect'));
        // should never be reached
        throw new ActionAbort('show');
    }
    /**
     * Execute the redirect
     *
     * Default action for ACTION_SHOW_REDIRECT
     *
     * @param array $opts id and fragment for the redirect and the preact
     */
    public function redirect($opts) {
        $go = wl($opts['id'], $opts['params'], true, '&'); /** 第二引数を指定 **/
        if(isset($opts['fragment'])) $go .= '#' . $opts['fragment'];
        //show it
        send_redirect($go);
    }
===== 課題 =====
DokuWikiソースに手を加えなくていいよう、Plugin 化したい。