PHP PukiWiki Utility::explodeAnchor示例

function plugin_back_convert()
{
    $_msg_back_word = T_('Back');
    if (func_num_args() > 4) {
        return PLUGIN_BACK_USAGE;
    }
    list($word, $align, $hr, $href) = array_pad(func_get_args(), 4, '');
    $word = trim($word);
    $word = $word == '' ? $_msg_back_word : htmlsc($word);
    $align = strtolower(trim($align));
    switch ($align) {
        case '':
            $align = 'center';
            /*FALLTHROUGH*/
        /*FALLTHROUGH*/
        case 'center':
            /*FALLTHROUGH*/
        /*FALLTHROUGH*/
        case 'left':
            /*FALLTHROUGH*/
        /*FALLTHROUGH*/
        case 'right':
            break;
        default:
            return PLUGIN_BACK_USAGE;
    }
    $hr = trim($hr) != '0' ? '<hr class="full_hr" />' . "\n" : '';
    $link = TRUE;
    $href = trim($href);
    if (!empty($href)) {
        if (Auth::check_role('safemode')) {
            if (is_url($href)) {
                $href = rawurlencode($href);
            } else {
                $wiki = Factory::Wiki($array[0]);
                $array = Utility::explodeAnchor($href);
                $array[1] = !empty($array[1]) ? '#' . rawurlencode($array[1]) : '';
                $href = $wiki->uri() . $array[1];
                $link = $wiki->has();
            }
        } else {
            $href = rawurlencode($href);
        }
    } else {
        $href = 'javascript:history.go(-1)';
    }
    if ($link) {
        // Normal link
        return $hr . '<div style="text-align:' . $align . '">' . '[ <a href="' . $href . '">' . $word . '</a> ]</div>' . "\n";
    } else {
        // Dangling link
        return $hr . '<div style="text-align:' . $align . '">' . '[ <span class="noexists">' . $word . '<a href="' . $href . '">?</a></span> ]</div>' . "\n";
    }
}