PHP admin_get_root函数代码示例

 /**
  * Gets the content for this block
  */
 function get_content()
 {
     global $CFG;
     // First check if we have already generated, don't waste cycles
     if ($this->contentgenerated === true) {
         return $this->content;
     }
     $this->content = new stdClass();
     if (get_user_preferences('admin_bookmarks')) {
         require_once $CFG->libdir . '/adminlib.php';
         $adminroot = admin_get_root(false, false);
         // settings not required - only pages
         $bookmarks = explode(',', get_user_preferences('admin_bookmarks'));
         /// Accessibility: markup as a list.
         $contents = array();
         foreach ($bookmarks as $bookmark) {
             $temp = $adminroot->locate($bookmark);
             if ($temp instanceof admin_settingpage) {
                 $contenturl = new moodle_url('/admin/settings.php', array('section' => $bookmark));
                 $contentlink = html_writer::link($contenturl, $temp->visiblename);
                 $contents[] = html_writer::tag('li', $contentlink);
             } else {
                 if ($temp instanceof admin_externalpage) {
                     $contenturl = new moodle_url($temp->url);
                     $contentlink = html_writer::link($contenturl, $temp->visiblename);
                     $contents[] = html_writer::tag('li', $contentlink);
                 }
             }
         }
         $this->content->text = html_writer::tag('ol', implode('', $contents), array('class' => 'list'));
     } else {
         $bookmarks = array();
     }
     $this->content->footer = '';
     $this->page->settingsnav->initialise();
     $node = $this->page->settingsnav->get('root', navigation_node::TYPE_SITE_ADMIN);
     if (!$node || !$node->contains_active_node()) {
         return $this->content;
     }
     $section = $node->find_active_node()->key;
     if ($section == 'search' || empty($section)) {
         // the search page can't be properly bookmarked at present
         $this->content->footer = '';
     } else {
         if (in_array($section, $bookmarks)) {
             $deleteurl = new moodle_url('/blocks/admin_bookmarks/delete.php', array('section' => $section, 'sesskey' => sesskey()));
             $this->content->footer = html_writer::link($deleteurl, get_string('unbookmarkthispage', 'admin'));
         } else {
             $createurl = new moodle_url('/blocks/admin_bookmarks/create.php', array('section' => $section, 'sesskey' => sesskey()));
             $this->content->footer = html_writer::link($createurl, get_string('bookmarkthispage', 'admin'));
         }
     }
     return $this->content;
 }

 function url_get_path()
 {
     global $CFG;
     $adminroot = admin_get_root();
     $root = $adminroot->locate($this->section);
     if (is_a($root, 'admin_externalpage')) {
         return $root->url;
     } else {
         return $CFG->wwwroot . '/' . $CFG->admin . '/settings.php';
     }
 }

 function get_content()
 {
     global $CFG, $USER;
     if ($this->content !== NULL) {
         return $this->content;
     }
     $this->content = new stdClass();
     $this->content->text = '';
     if (get_user_preferences('admin_bookmarks')) {
         // this is expensive! Only require when bookmakrs exist..
         require_once $CFG->libdir . '/adminlib.php';
         $adminroot = admin_get_root(false, false);
         // settings not required - only pages
         $bookmarks = explode(',', get_user_preferences('admin_bookmarks'));
         // hmm... just a liiitle (potentially) processor-intensive
         // (recall that $adminroot->locate is a huge recursive call... and we're calling it repeatedly here
         /// Accessibility: markup as a list.
         $this->content->text .= '<ol class="list">' . "\n";
         foreach ($bookmarks as $bookmark) {
             $temp = $adminroot->locate($bookmark);
             if ($temp instanceof admin_settingpage) {
                 $this->content->text .= '<li><a href="' . $CFG->wwwroot . '/' . $CFG->admin . '/settings.php?section=' . $bookmark . '">' . $temp->visiblename . "</a></li>\n";
             } else {
                 if ($temp instanceof admin_externalpage) {
                     $this->content->text .= '<li><a href="' . $temp->url . '">' . $temp->visiblename . "</a></li>\n";
                 }
             }
         }
         $this->content->text .= "</ol>\n";
     } else {
         $bookmarks = array();
     }
     // TODO
     if (isset($this->page->section) and $this->page->section == 'search') {
         // the search page can't be properly bookmarked at present
         $this->content->footer = '';
     } else {
         if (($section = isset($this->page->section) ? $this->page->section : '') && in_array($section, $bookmarks)) {
             $this->content->footer = '<a href="' . $CFG->wwwroot . '/blocks/admin_bookmarks/delete.php?section=' . $section . '&amp;sesskey=' . sesskey() . '">' . get_string('unbookmarkthispage', 'admin') . '</a>';
         } else {
             if ($section = isset($this->page->section) ? $this->page->section : '') {
                 $this->content->footer = '<a href="' . $CFG->wwwroot . '/blocks/admin_bookmarks/create.php?section=' . $section . '&amp;sesskey=' . sesskey() . '">' . get_string('bookmarkthispage', 'admin') . '</a>';
             } else {
                 $this->content->footer = '';
             }
         }
     }
     return $this->content;
 }

        }
    } else {
        $icons = $OUTPUT->spacer() . ' ';
    }
    // Move icons.
    $icons .= question_type_icon_html('up', $qtypename, 't/up', get_string('up'), '');
    $icons .= question_type_icon_html('down', $qtypename, 't/down', get_string('down'), '');
    $row[] = $icons;
    // Delete link, if available.
    if ($needed[$qtypename]) {
        $row[] = '';
    } else {
        $row[] = html_writer::link(new moodle_url($thispageurl, array('delete' => $qtypename, 'sesskey' => sesskey())), get_string('delete'), array('title' => get_string('uninstallqtype', 'question')));
    }
    // Settings link, if available.
    $settings = admin_get_root()->locate('qtypesetting' . $qtypename);
    if ($settings instanceof admin_externalpage) {
        $row[] = html_writer::link($settings->url, get_string('settings'));
    } else {
        if ($settings instanceof admin_settingpage) {
            $row[] = html_writer::link(new moodle_url('/admin/settings.php', array('section' => 'qtypesetting' . $qtypename)), get_string('settings'));
        } else {
            $row[] = '';
        }
    }
    $table->add_data($row, $rowclass);
}
$table->finish_output();
echo $OUTPUT->footer();
function question_types_enable_disable_icons($qtypename, $createable)
{

function admin_externalpage_setup($section)
{
    global $CFG, $PAGE, $USER;
    $adminroot = admin_get_root();
    require_once $CFG->libdir . '/blocklib.php';
    require_once $CFG->dirroot . '/' . $CFG->admin . '/pagelib.php';
    page_map_class(PAGE_ADMIN, 'page_admin');
    $PAGE = page_create_object(PAGE_ADMIN, 0);
    // there must be any constant id number
    $PAGE->init_extra($section);
    // hack alert!
    $root = $adminroot->locate($PAGE->section);
    if ($site = get_site()) {
        require_login();
    } else {
        redirect($CFG->wwwroot . '/' . $CFG->admin . '/index.php');
        die;
    }
    if (!is_a($root, 'admin_externalpage')) {
        error(get_string('sectionerror', 'admin'));
        die;
    }
    // this eliminates our need to authenticate on the actual pages
    if (!$root->check_access()) {
        error(get_string('accessdenied', 'admin'));
        die;
    }
    $adminediting = optional_param('adminedit', -1, PARAM_BOOL);
    if (!isset($USER->adminediting)) {
        $USER->adminediting = false;
    }
    if ($PAGE->user_allowed_editing()) {
        if ($adminediting == 1) {
            $USER->adminediting = true;
        } elseif ($adminediting == 0) {
            $USER->adminediting = false;
        }
    }
}

    // probably new installation - lets return to frontpage after this step
    // remove settings that we want uninitialised
    unset_config('registerauth');
    redirect('upgradesettings.php?return=site');
}
/// Check if we are returning from moodle.org registration and if so, we mark that fact to remove reminders
if (!empty($id)) {
    if ($id == $CFG->siteidentifier) {
        set_config('registered', time());
    }
}
/// setup critical warnings before printing admin tree block
$insecuredataroot = is_dataroot_insecure(true);
$register_globals_enabled = ini_get_bool('register_globals');
$SESSION->admin_critical_warning = $register_globals_enabled || $insecuredataroot == INSECURE_DATAROOT_ERROR;
$adminroot =& admin_get_root();
/// Check if there are any new admin settings which have still yet to be set
if (any_new_admin_settings($adminroot)) {
    redirect('upgradesettings.php');
}
/// Everything should now be set up, and the user is an admin
/// Print default admin page with notifications.
admin_externalpage_setup('adminnotifications');
admin_externalpage_print_header();
/// Deprecated database! Warning!!
if (!empty($CFG->migrated_to_new_db)) {
    print_box(print_string('dbmigrationdeprecateddb', 'admin'), 'generalbox adminwarning');
}
/// Check for any special upgrades that might need to be run
if (!empty($CFG->upgrade)) {
    print_box(get_string("upgrade{$CFG->upgrade}", "admin", "{$CFG->wwwroot}/{$CFG->admin}/upgrade{$CFG->upgrade}.php"));

// check that site is properly customized
$site = get_site();
if (empty($site->shortname)) {
    // probably new installation - lets return to frontpage after this step
    // remove settings that we want uninitialised
    unset_config('registerauth');
    redirect('upgradesettings.php?return=site');
}
// Check if we are returning from moodle.org registration and if so, we mark that fact to remove reminders
if (!empty($id) and $id == $CFG->siteidentifier) {
    set_config('registered', time());
}
// setup critical warnings before printing admin tree block
$insecuredataroot = is_dataroot_insecure(true);
$SESSION->admin_critical_warning = $insecuredataroot == INSECURE_DATAROOT_ERROR;
$adminroot = admin_get_root();
// Check if there are any new admin settings which have still yet to be set
if (any_new_admin_settings($adminroot)) {
    redirect('upgradesettings.php');
}
// Everything should now be set up, and the user is an admin
// Print default admin page with notifications.
$errorsdisplayed = defined('WARN_DISPLAY_ERRORS_ENABLED');
$lastcron = $DB->get_field_sql('SELECT MAX(lastcron) FROM {modules}');
$cronoverdue = $lastcron < time() - 3600 * 24;
$dbproblems = $DB->diagnose();
$maintenancemode = !empty($CFG->maintenance_enabled);
$updateschecker = available_update_checker::instance();
$availableupdates = $updateschecker->get_update_info('core', array('minmaturity' => $CFG->updateminmaturity, 'notifybuilds' => $CFG->updatenotifybuilds));
$availableupdatesfetch = $updateschecker->get_last_timefetched();
admin_externalpage_setup('adminnotifications');

if ($data = data_submitted() and confirm_sesskey()) {
    if (admin_write_settings($data)) {
        $statusmsg = get_string('changessaved');
    }
    if (empty($adminroot->errors)) {
        switch ($return) {
            case 'site':
                redirect("{$CFG->wwwroot}/");
            case 'admin':
                redirect("{$CFG->wwwroot}/{$CFG->admin}/");
        }
    } else {
        $errormsg = get_string('errorwithsettings', 'admin');
        $firsterror = reset($adminroot->errors);
    }
    $adminroot = admin_get_root(true);
    //reload tree
    $settingspage = $adminroot->locate($section, true);
}
if ($PAGE->user_allowed_editing() && $adminediting != -1) {
    $USER->editing = $adminediting;
}
/// print header stuff ------------------------------------------------------------
if (empty($SITE->fullname)) {
    $PAGE->set_title($settingspage->visiblename);
    $PAGE->set_heading($settingspage->visiblename);
    echo $OUTPUT->header();
    echo $OUTPUT->box(get_string('configintrosite', 'admin'));
    if ($errormsg !== '') {
        echo $OUTPUT->notification($errormsg);
    } else {

    function get_content()
    {
        global $CFG;
        if ($this->content !== NULL) {
            return $this->content;
        }
        if (isguestuser() or !isloggedin()) {
            // these users can not change any settings
            $this->content = '';
            return '';
        }
        require_once $CFG->libdir . '/adminlib.php';
        $adminroot =& admin_get_root(false, false);
        // settings not required - only pages
        if ($current = $adminroot->locate($this->section, true)) {
            $this->pathtosection = $current->path;
            array_pop($this->pathtosection);
        }
        // we need to do this instead of $this->build_tree($adminroot) because the top-level folder
        // is redundant (and ideally ignored). (the top-level folder is "administration".)
        $entries = array_keys($adminroot->children);
        asort($entries);
        foreach ($entries as $entry) {
            $this->build_tree($adminroot->children[$entry]);
        }
        if ($this->tempcontent !== '') {
            $closedimg = '<img src="' . $CFG->pixpath . '/i/closed.gif" alt="' . s(get_string('folderclosed')) . '" />';
            $openedimg = '<img src="' . $CFG->pixpath . '/i/open.gif" alt="' . s(get_string('folderopened')) . '" />';
            $this->content = new object();
            $this->content->text = '
<script type="text/javascript">
//<![CDATA[
var vh_numdivs = ' . ($this->divcounter - 1) . ';
var parkplatz  = new Array();
for (var i=1; i<=vh_numdivs; i++) {
    parkplatz[i] = null;
}

function menu_toggle(i) {
    i = parseInt(i);
    if (parkplatz[i] === null) {
        collapse(i);
    } else {
        expand(i);
    }
}

function collapse(i) {
    if (parkplatz[i] !== null) {
        return;
    }
    var obj = document.getElementById("vh_div"+String(i));
    if (obj === null) {
        return;
    }
    var nothing = document.createElement("span");
    nothing.setAttribute("id", "vh_div"+String(i));
    parkplatz[i] = obj;
    obj.parentNode.replaceChild(nothing, obj);
    var icon = document.getElementById("vh_div"+String(i)+"indicator");
    icon.innerHTML = "' . addslashes_js($closedimg) . '";
}

function expand(i) {
    if (parkplatz[i] === null) {
        return;
    }
    var nothing = document.getElementById("vh_div"+String(i));
    var obj = parkplatz[i];
    parkplatz[i] = null;
    nothing.parentNode.replaceChild(obj, nothing);
    var icon = document.getElementById("vh_div"+String(i)+"indicator");
    icon.innerHTML = "' . addslashes_js($openedimg) . '";
}

function expandall() {
    for (i=1; i<=vh_numdivs; i++) {
        expand(i);
    }
}

function collapseall() {
    for (var i=vh_numdivs; i>0; i--) {
        collapse(i);
    }
}

//]]>
</script>
<div class="admintree">

' . $this->tempcontent . '

</div>
<script type="text/javascript">
//<![CDATA[
collapseall();
' . $this->expandjavascript . ';
//]]>
</script>';
//.........这里部分代码省略.........

 } else {
     $plugin = new stdClass();
     $plugin->version = '???';
     if (file_exists("{$CFG->dirroot}/blocks/{$blockname}/version.php")) {
         include "{$CFG->dirroot}/blocks/{$blockname}/version.php";
     }
     if (!($blockobject = block_instance($block->name))) {
         $incompatible[] = $block;
         continue;
     }
 }
 $delete = '<a href="blocks.php?delete=' . $blockid . '&amp;sesskey=' . sesskey() . '">' . $strdelete . '</a>';
 $settings = '';
 // By default, no configuration
 if ($blockobject and $blockobject->has_config()) {
     $blocksettings = admin_get_root()->locate('blocksetting' . $block->name);
     if ($blocksettings instanceof admin_externalpage) {
         $settings = '<a href="' . $blocksettings->url . '">' . get_string('settings') . '</a>';
     } else {
         if ($blocksettings instanceof admin_settingpage) {
             $settings = '<a href="' . $CFG->wwwroot . '/' . $CFG->admin . '/settings.php?section=blocksetting' . $block->name . '">' . $strsettings . '</a>';
         } else {
             $settings = '<a href="block.php?block=' . $blockid . '">' . $strsettings . '</a>';
         }
     }
 }
 // MDL-11167, blocks can be placed on mymoodle, or the blogs page
 // and it should not show up on course search page
 $totalcount = $DB->count_records('block_instances', array('blockname' => $blockname));
 $count = $DB->count_records('block_instances', array('blockname' => $blockname, 'pagetypepattern' => 'course-view-*'));
 if ($count > 0) {

 /**
  * Gets a string with PHP code to inject default values to the upgrade processes
  *
  * @todo Try to respect DRY and unify part of package_ingredients with settings_to_php
  * @uses flavours_php_writer
  * @param array $selectedsettings
  * @returns array PHP code, one line per array element, the caller will make a string or a file
  */
 public function settings_to_php($selectedsettings)
 {
     $phparray = array();
     $adminroot = admin_get_root();
     $this->get_branch_settings($adminroot->children, $this, true);
     foreach ($selectedsettings as $settingspage) {
         // Settings page path
         $namespace = explode('/', $settingspage);
         // The admin settingspage is the last one
         $page = array_pop($namespace);
         if (!($settings = $this->get_settingspage_settings($namespace, $page, $this))) {
             continue;
         }
         $settingspagetagname = str_replace('/', '.', $settingspage);
         // Adding settings
         foreach ($settings as $setting) {
             // Can\'t refactor the whole 'core' code to 'moodle' to maintain
             // backward compatibility with flavours packages
             if ($setting->plugin == 'core') {
                 $setting->plugin = 'moodle';
             }
             // Restore slashes
             $setting->plugin = str_replace('.', '/', $setting->plugin);
             // Valu with addslashes only in the single qoute
             $value = $this->get_setting_value($setting->name, $setting->plugin);
             $value = str_replace("'", "\\'", $value);
             $phparray[] = $this->add_setting_php($setting->plugin, $setting->name, $value);
             // Adding the extra values of the setting (if present) to the attributes array
             if (!empty($setting->attrs)) {
                 foreach ($setting->attrs as $attrname => $value) {
                     $phparray[] = $this->add_setting_php($setting->plugin, $attrname, $value);
                 }
             }
         }
     }
     return $phparray;
 }

 function get_content()
 {
     global $CFG;
     if ($this->content !== NULL) {
         return $this->content;
     }
     if (isguestuser() or !isloggedin()) {
         // these users can not change any settings
         $this->content = '';
         return '';
     }
     require_once $CFG->libdir . '/adminlib.php';
     $adminroot = admin_get_root(false, false);
     // settings not required - only pages
     if ($current = $adminroot->locate($this->section, true)) {
         $this->pathtosection = $current->path;
         array_pop($this->pathtosection);
     }
     // we need to do this instead of $this->build_tree($adminroot) because the top-level folder
     // is redundant (and ideally ignored). (the top-level folder is "administration".)
     $entries = array_keys($adminroot->children);
     asort($entries);
     foreach ($entries as $entry) {
         $this->build_tree($adminroot->children[$entry]);
     }
     if ($this->tempcontent !== '') {
         require_js(array('yui_yahoo', 'yui_event'));
         require_js('blocks/admin_tree/admintree.js');
         $this->content = new object();
         $this->content->text = '<div class="admintree">' . $this->tempcontent . "</div>\n";
         $this->content->text .= print_js_call('admin_tree.init', array($this->divcounter - 1, $this->expandnodes, $CFG->pixpath, get_string('folderopened'), get_string('folderclosed')), true);
         // only do search if you have moodle/site:config
         if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
             $this->content->footer = '<div class="adminsearchform">' . '<form action="' . $CFG->wwwroot . '/' . $CFG->admin . '/search.php" method="get"><div>' . '<label for="query" class="accesshide">' . get_string('searchinsettings', 'admin') . '</label>' . '<input type="text" name="query" id="query" size="8" value="' . s($adminroot->search) . '" />' . '<input type="submit" value="' . get_string('search') . '" /></div>' . '</form></div>';
         } else {
             $this->content->footer = '';
         }
     } else {
         $this->content = new object();
         $this->content->text = '';
     }
     return $this->content;
 }

function upgrade_group_db($continueto)
{
    /// This function upgrades the group tables, if necessary
    /// It's called from admin/index.php.
    global $CFG, $db;
    $group_version = '';
    // Get code versions
    require "{$CFG->dirroot}/group/version.php";
    if (empty($CFG->group_version)) {
        // New 1.8 groups have never been installed...
        $strdatabaseupgrades = get_string('databaseupgrades');
        print_header($strdatabaseupgrades, $strdatabaseupgrades, $strdatabaseupgrades, '', upgrade_get_javascript(), false, " ", " ");
        upgrade_log_start();
        //initialize default group settings now
        install_group_db();
        $adminroot = admin_get_root();
        print_continue($continueto);
        print_footer('none');
        exit;
    }
    /// Upgrading code starts here
    if ($group_version > $CFG->group_version) {
        // Upgrade tables
        $strdatabaseupgrades = get_string('databaseupgrades');
        print_header($strdatabaseupgrades, $strdatabaseupgrades, $strdatabaseupgrades, '', upgrade_get_javascript());
        upgrade_log_start();
        print_heading('group');
        $db->debug = true;
        $status = xmldb_group_upgrade($CFG->group_version);
        $db->debug = false;
        /// Now analyze upgrade results
        if ($status) {
            // No upgrading failed
            if (set_config('group_version', $group_version)) {
                notify(get_string('databasesuccess'), 'green');
                notify(get_string('databaseupgradegroups', '', $group_version), 'green');
                print_continue($continueto);
                print_footer('none');
                exit;
            } else {
                error("Error: Upgrade of group system failed! (Could not update version in config table)");
            }
        } else {
            error("Error: Upgrade failed! See group/upgrade.php");
        }
    } else {
        if ($group_version < $CFG->group_version) {
            error("Error:  The code you are using is OLDER than the version that made these databases!");
        }
    }
}

    /**
     * Gets the content for this block
     */
    function get_content()
    {
        global $CFG, $PAGE;
        // First check if we have already generated, don't waste cycles
        if ($this->contentgenerated === true) {
            return $this->content;
        }
        $this->content = new stdClass();
        if (get_user_preferences('user_bookmarks')) {
            require_once $CFG->libdir . '/adminlib.php';
            $adminroot = admin_get_root(false, false);
            // settings not required - only pages
            $tempbookmarks = explode(',', get_user_preferences('user_bookmarks'));
            /// Accessibility: markup as a list.
            $contents = array();
            foreach ($tempbookmarks as $bookmark) {
                //the bookmarks are in the following format- url;title
                //so exploading the bookmark by ";" to get the url and title
                $tempBookmark = explode(';', $bookmark);
                //making the url for bookmark
                $contenturl = new moodle_url($CFG->wwwroot . $tempBookmark[0]);
                //now making a link
                $contentlink = html_writer::link($contenturl, $tempBookmark[1]);
                //this is the url to delete bookmark
                $bookmarkdeleteurl = new moodle_url('/blocks/user_bookmarks/delete.php', array('bookmarkurl' => $tempBookmark[0], 'sesskey' => sesskey()));
                //this has the link to delete the bookmark
                $deleteLink = "<a href='{$bookmarkdeleteurl}'><img alt='Delete Bookmark' title='Delete Bookmark' src='{$CFG->wwwroot}/blocks/user_bookmarks/pix/delete.gif'></a>";
                //creating the link to update the title for bookmark
                $editLink = '<script type="text/javascript">
		                         function updateBookmark(bookmarkURL, defaultTitle, sesskey, wwwroot) {
			                         var newBookmarkTitle = prompt(\'Edit Bookmark title\',defaultTitle);
			                         if (newBookmarkTitle == "" || newBookmarkTitle == null) {
			                             newBookmarkTitle = defaultTitle;
			                         }else {
			                             var redirectPage = wwwroot + "/blocks/user_bookmarks/update.php?bookmarkurl=" + escape(bookmarkURL) + "&title=" + escape(newBookmarkTitle) + "&sesskey=" + sesskey;
			                             window.location = redirectPage;
			                         }
		                         }
		                     </script>
				             <a style="cursor: pointer;" onClick="updateBookmark(\'' . $tempBookmark[0] . '\', \'' . $tempBookmark[1] . '\', \'' . sesskey() . '\', \'' . $CFG->wwwroot . '\');">
				                 <img alt="Delete Bookmark" title="Delete Bookmark" src="' . $CFG->wwwroot . '/blocks/user_bookmarks/pix/edit.gif">
				             </a>';
                //setting layout for the bookmark and its delete and edit buttons
                $contents[] = html_writer::tag('li', $contentlink . " " . $editLink . " " . $deleteLink);
                $bookmarks[] = htmlspecialchars_decode($tempBookmark[0]);
            }
            $this->content->text = html_writer::tag('ol', implode('', $contents), array('class' => 'list'));
        } else {
            $bookmarks = array();
        }
        $this->content->footer = '';
        $this->page->settingsnav->initialise();
        $node = $this->page->settingsnav->get('root', navigation_node::TYPE_SETTING);
        $bookmarkurl = htmlspecialchars_decode(str_replace($CFG->wwwroot, '', $PAGE->url));
        $bookmarktitle = $PAGE->title;
        if (in_array($bookmarkurl, $bookmarks)) {
            //this prints out the link to unbookmark a page
            $this->content->footer = '<script type="text/javascript">
		                               function deleteBookmark(bookmarkURL, sesskey, wwwroot) {
			                               var redirectPage = wwwroot + "/blocks/user_bookmarks/delete.php?bookmarkurl=" + escape(bookmarkURL) + "&sesskey=" + sesskey;
			                               window.location = redirectPage;
		                               }
		                               </script>
		                               <form style="cursor: hand;">
                                           <a style="cursor: pointer;" onClick="deleteBookmark(\'' . $bookmarkurl . '\', \'' . sesskey() . '\', \'' . $CFG->wwwroot . '\');">Unbookmark this page</a>
                                       </form>';
        } else {
            //this prints out link to bookmark a page
            $this->content->footer = '<script type="text/javascript">
		                               function addBookmark(bookmarkURL, defaultTitle, sesskey, wwwroot) {
			                               var newBookmarkTitle = prompt(\'Enter a title for the Bookmark\',defaultTitle);
			                               if (newBookmarkTitle == "" || newBookmarkTitle == null) {
			                               	   newBookmarkTitle = defaultTitle;
			                               } else {
			                                   var redirectPage = wwwroot + "/blocks/user_bookmarks/create.php?bookmarkurl=" + escape(bookmarkURL) + "&title=" + newBookmarkTitle + "&sesskey=" + sesskey;
			                                   window.location = redirectPage;
			                               }
		                               }
		                               </script>
				                       <form>
				                       	   <a style="cursor: pointer;" onClick="addBookmark(\'' . $bookmarkurl . '\', \'' . $bookmarktitle . '\', \'' . sesskey() . '\', \'' . $CFG->wwwroot . '\');">bookmark this page</a>
                                       </form>';
        }
        return $this->content;
    }

// page is loaded (i.e. both when we're displaying the form and then when we process the form's input).
// if the return values don't match, we could potentially lose changes that the admin is making.
$newsettingshtml = output_new_settings_by_page(admin_get_root());
// first we deal with the case where there are no new settings to be set
if ($newsettingshtml == '') {
    if ($return == 'site') {
        redirect("{$CFG->wwwroot}/");
    } else {
        redirect("{$CFG->wwwroot}/{$CFG->admin}/index.php");
    }
}
// now we'll deal with the case that the admin has submitted the form with new settings
if ($data = data_submitted()) {
    $unslashed = (array) stripslashes_recursive($data);
    if (confirm_sesskey()) {
        $newsettings = find_new_settings(admin_get_root());
        $errors = '';
        foreach ($newsettings as $newsetting) {
            if (isset($unslashed['s_' . $newsetting->name])) {
                $errors .= $newsetting->write_setting($unslashed['s_' . $newsetting->name]);
            } else {
                $errors .= $newsetting->write_setting($newsetting->defaultsetting);
            }
        }
        if (empty($errors)) {
            // there must be either redirect without message or continue button or else upgrade would be sometimes broken
            if ($return == 'site') {
                redirect("{$CFG->wwwroot}/");
            } else {
                redirect("{$CFG->wwwroot}/{$CFG->admin}/index.php");
            }