/**
 * Send an email to a specified user
 *
 * @param stdClass $user  A {@link $USER} object
 * @param stdClass $from A {@link $USER} object
 * @param string $subject plain text subject line of the email
 * @param string $messagetext plain text version of the message
 * @param string $messagehtml complete html version of the message (optional)
 * @param string $attachment a file on the filesystem, either relative to $CFG->dataroot or a full path to a file in $CFG->tempdir
 * @param string $attachname the name of the file (extension indicates MIME)
 * @param bool $usetrueaddress determines whether $from email address should
 *          be sent out. Will be overruled by user profile setting for maildisplay
 * @param string $replyto Email address to reply to
 * @param string $replytoname Name of reply to recipient
 * @param int $wordwrapwidth custom word wrap width, default 79
 * @return bool Returns true if mail was sent OK and false if there was an error.
 */
function email_to_user($user, $from, $subject, $messagetext, $messagehtml = '', $attachment = '', $attachname = '', $usetrueaddress = true, $replyto = '', $replytoname = '', $wordwrapwidth = 79)
{
    global $CFG, $PAGE, $SITE;
    if (empty($user) or empty($user->id)) {
        debugging('Can not send email to null user', DEBUG_DEVELOPER);
        return false;
    }
    if (empty($user->email)) {
        debugging('Can not send email to user without email: ' . $user->id, DEBUG_DEVELOPER);
        return false;
    }
    if (!empty($user->deleted)) {
        debugging('Can not send email to deleted user: ' . $user->id, DEBUG_DEVELOPER);
        return false;
    }
    if (defined('BEHAT_SITE_RUNNING')) {
        // Fake email sending in behat.
        return true;
    }
    if (!empty($CFG->noemailever)) {
        // Hidden setting for development sites, set in config.php if needed.
        debugging('Not sending email due to $CFG->noemailever config setting', DEBUG_NORMAL);
        return true;
    }
    if (email_should_be_diverted($user->email)) {
        $subject = "[DIVERTED {$user->email}] {$subject}";
        $user = clone $user;
        $user->email = $CFG->divertallemailsto;
    }
    // Skip mail to suspended users.
    if (isset($user->auth) && $user->auth == 'nologin' or isset($user->suspended) && $user->suspended) {
        return true;
    }
    if (!validate_email($user->email)) {
        // We can not send emails to invalid addresses - it might create security issue or confuse the mailer.
        debugging("email_to_user: User {$user->id} (" . fullname($user) . ") email ({$user->email}) is invalid! Not sending.");
        return false;
    }
    if (over_bounce_threshold($user)) {
        debugging("email_to_user: User {$user->id} (" . fullname($user) . ") is over bounce threshold! Not sending.");
        return false;
    }
    // TLD .invalid  is specifically reserved for invalid domain names.
    // For More information, see {@link http://tools.ietf.org/html/rfc2606#section-2}.
    if (substr($user->email, -8) == '.invalid') {
        debugging("email_to_user: User {$user->id} (" . fullname($user) . ") email domain ({$user->email}) is invalid! Not sending.");
        return true;
        // This is not an error.
    }
    // If the user is a remote mnet user, parse the email text for URL to the
    // wwwroot and modify the url to direct the user's browser to login at their
    // home site (identity provider - idp) before hitting the link itself.
    if (is_mnet_remote_user($user)) {
        require_once $CFG->dirroot . '/mnet/lib.php';
        $jumpurl = mnet_get_idp_jump_url($user);
        $callback = partial('mnet_sso_apply_indirection', $jumpurl);
        $messagetext = preg_replace_callback("%({$CFG->wwwroot}[^[:space:]]*)%", $callback, $messagetext);
        $messagehtml = preg_replace_callback("%href=[\"'`]({$CFG->wwwroot}[\\w_:\\?=#&@/;.~-]*)[\"'`]%", $callback, $messagehtml);
    }
    $mail = get_mailer();
    if (!empty($mail->SMTPDebug)) {
        echo '<pre>' . "\n";
    }
    $temprecipients = array();
    $tempreplyto = array();
    // Make sure that we fall back onto some reasonable no-reply address.
    $noreplyaddress = empty($CFG->noreplyaddress) ? 'noreply@' . get_host_from_url($CFG->wwwroot) : $CFG->noreplyaddress;
    // Make up an email address for handling bounces.
    if (!empty($CFG->handlebounces)) {
        $modargs = 'B' . base64_encode(pack('V', $user->id)) . substr(md5($user->email), 0, 16);
        $mail->Sender = generate_email_processing_address(0, $modargs);
    } else {
        $mail->Sender = $noreplyaddress;
    }
    $alloweddomains = null;
    if (!empty($CFG->allowedemaildomains)) {
        $alloweddomains = explode(PHP_EOL, $CFG->allowedemaildomains);
    }
    // Email will be sent using no reply address.
    if (empty($alloweddomains)) {
        $usetrueaddress = false;
    }
    if (is_string($from)) {
//.........这里部分代码省略.........

/**
 * Main post-install tasks to be executed after the BD schema is available
 *
 * This function is automatically executed after Moodle core DB has been
 * created at initial install. It's in charge of perform the initial tasks
 * not covered by the {@link install.xml} file, like create initial users,
 * roles, templates, moving stuff from other plugins...
 *
 * Note that the function is only invoked once, at install time, so if new tasks
 * are needed in the future, they will need to be added both here (for new sites)
 * and in the corresponding {@link upgrade.php} file (for existing sites).
 *
 * All plugins within Moodle (modules, blocks, reports...) support the existence of
 * their own install.php file, using the "Frankenstyle" component name as
 * defined at {@link http://docs.moodle.org/dev/Frankenstyle}, for example:
 *     - {@link xmldb_page_install()}. (modules don't require the plugintype ("mod_") to be used.
 *     - {@link xmldb_enrol_meta_install()}.
 *     - {@link xmldb_workshopform_accumulative_install()}.
 *     - ....
 *
 * Finally, note that it's also supported to have one uninstall.php file that is
 * executed also once, each time one plugin is uninstalled (before the DB schema is
 * deleted). Those uninstall files will contain one function, using the "Frankenstyle"
 * naming conventions, like {@link xmldb_enrol_meta_uninstall()} or {@link xmldb_workshop_uninstall()}.
 */
function xmldb_main_install()
{
    global $CFG, $DB, $SITE, $OUTPUT;
    // Make sure system context exists
    $syscontext = context_system::instance(0, MUST_EXIST, false);
    if ($syscontext->id != SYSCONTEXTID) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected new system context id!');
    }
    // Create site course
    if ($DB->record_exists('course', array())) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Can not create frontpage course, courses already exist.');
    }
    $newsite = new stdClass();
    $newsite->fullname = '';
    $newsite->shortname = '';
    $newsite->summary = NULL;
    $newsite->newsitems = 3;
    $newsite->numsections = 1;
    $newsite->category = 0;
    $newsite->format = 'site';
    // Only for this course
    $newsite->timecreated = time();
    $newsite->timemodified = $newsite->timecreated;
    if (defined('SITEID')) {
        $newsite->id = SITEID;
        $DB->import_record('course', $newsite);
        $DB->get_manager()->reset_sequence('course');
    } else {
        $newsite->id = $DB->insert_record('course', $newsite);
        define('SITEID', $newsite->id);
    }
    // set the field 'numsections'. We can not use format_site::update_format_options() because
    // the file is not loaded
    $DB->insert_record('course_format_options', array('courseid' => SITEID, 'format' => 'site', 'sectionid' => 0, 'name' => 'numsections', 'value' => $newsite->numsections));
    $SITE = get_site();
    if ($newsite->id != $SITE->id) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected new site course id!');
    }
    // Make sure site course context exists
    context_course::instance($SITE->id);
    // Update the global frontpage cache
    $SITE = $DB->get_record('course', array('id' => $newsite->id), '*', MUST_EXIST);
    // Create default course category
    if ($DB->record_exists('course_categories', array())) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Can not create default course category, categories already exist.');
    }
    $cat = new stdClass();
    $cat->name = get_string('miscellaneous');
    $cat->depth = 1;
    $cat->sortorder = MAX_COURSES_IN_CATEGORY;
    $cat->timemodified = time();
    $catid = $DB->insert_record('course_categories', $cat);
    $DB->set_field('course_categories', 'path', '/' . $catid, array('id' => $catid));
    // Make sure category context exists
    context_coursecat::instance($catid);
    $defaults = array('rolesactive' => '0', 'auth' => 'email', 'auth_pop3mailbox' => 'INBOX', 'enrol_plugins_enabled' => 'manual,guest,self,cohort', 'theme' => theme_config::DEFAULT_THEME, 'filter_multilang_converted' => 1, 'siteidentifier' => random_string(32) . get_host_from_url($CFG->wwwroot), 'backup_version' => 2008111700, 'backup_release' => '2.0 dev', 'mnet_dispatcher_mode' => 'off', 'sessiontimeout' => 7200, 'stringfilters' => '', 'filterall' => 0, 'texteditors' => 'atto,tinymce,textarea', 'upgrade_minmaxgradestepignored' => 1, 'upgrade_extracreditweightsstepignored' => 1, 'upgrade_calculatedgradeitemsignored' => 1);
    foreach ($defaults as $key => $value) {
        set_config($key, $value);
    }
    // Bootstrap mnet
    $mnethost = new stdClass();
    $mnethost->wwwroot = $CFG->wwwroot;
    $mnethost->name = '';
    $mnethost->name = '';
    $mnethost->public_key = '';
    if (empty($_SERVER['SERVER_ADDR'])) {
        // SERVER_ADDR is only returned by Apache-like webservers
        preg_match("@^(?:http[s]?://)?([A-Z0-9\\-\\.]+).*@i", $CFG->wwwroot, $matches);
        $my_hostname = $matches[1];
        $my_ip = gethostbyname($my_hostname);
        // Returns unmodified hostname on failure. DOH!
        if ($my_ip == $my_hostname) {
            $mnethost->ip_address = 'UNKNOWN';
        } else {
            $mnethost->ip_address = $my_ip;
//.........这里部分代码省略.........

     if ($CFG->smtpuser) {
         $mail->Username = $CFG->smtpuser;
         $mail->SMTPAuth = true;
     }
     if ($CFG->smtppass) {
         $mail->Password = $CFG->smtppass;
     }
     foreach ($emails as $email) {
         $mail->AddBCC($email);
         //echo $email . '<br>';
     }
     if ($CFG->noreplyaddress) {
         //if noreply isn't specified, use moodle default.
         $mail->From = $CFG->noreplyaddress;
     } else {
         $mail->From = 'noreply@' . get_host_from_url($CFG->wwwroot);
     }
     $mail->FromName = "noreply";
     $mail->Subject = short_string($subject, 75);
     $mail->Body = $subject . ' ' . get_string('today', 'block_cancelcourse') . ' ' . date('Y-m-d') . ':' . $shortname . $fullname . $name . PHP_EOL . PHP_EOL . $customtext;
     $mail->WordWrap = 75;
     $mail->CharSet = 'UTF-8';
     if ($mail->Send()) {
         echo '<div class="box generalbox" style="background-color: #73c376; font-weight: bold;"><p>' . get_string('emailmessage_sent', 'block_cancelcourse') . '</p></div>';
         $email_success = true;
     } else {
         echo print_error('emailmessage_notsent', 'block_cancelcourse' . $mail->ErrorInfo);
         $email_success = false;
     }
     $mail->SmtpClose();
 } else {

if ($hassiteconfig) {
    // speedup for non-admins, add all caps used on this page
    // "systempaths" settingpage
    $temp = new admin_settingpage('systempaths', get_string('systempaths', 'admin'));
    $temp->add(new admin_setting_configselect('gdversion', get_string('gdversion', 'admin'), get_string('configgdversion', 'admin'), check_gd_version(), array('0' => get_string('gdnot'), '1' => get_string('gd1'), '2' => get_string('gd2'))));
    $temp->add(new admin_setting_configexecutable('pathtodu', get_string('pathtodu', 'admin'), get_string('configpathtodu', 'admin'), ''));
    $temp->add(new admin_setting_configexecutable('aspellpath', get_string('aspellpath', 'admin'), get_string('edhelpaspellpath'), ''));
    $temp->add(new admin_setting_configexecutable('pathtodot', get_string('pathtodot', 'admin'), get_string('pathtodot_help', 'admin'), ''));
    $ADMIN->add('server', $temp);
    // "email" settingpage
    $temp = new admin_settingpage('mail', get_string('mail', 'admin'));
    $temp->add(new admin_setting_configtext('smtphosts', get_string('smtphosts', 'admin'), get_string('configsmtphosts', 'admin'), '', PARAM_RAW));
    $temp->add(new admin_setting_configtext('smtpuser', get_string('smtpuser', 'admin'), get_string('configsmtpuser', 'admin'), '', PARAM_NOTAGS));
    $temp->add(new admin_setting_configpasswordunmask('smtppass', get_string('smtppass', 'admin'), get_string('configsmtpuser', 'admin'), ''));
    $temp->add(new admin_setting_configtext('smtpmaxbulk', get_string('smtpmaxbulk', 'admin'), get_string('configsmtpmaxbulk', 'admin'), 1, PARAM_INT));
    $temp->add(new admin_setting_configtext('noreplyaddress', get_string('noreplyaddress', 'admin'), get_string('confignoreplyaddress', 'admin'), 'noreply@' . get_host_from_url($CFG->wwwroot), PARAM_NOTAGS));
    $temp->add(new admin_setting_configselect('digestmailtime', get_string('digestmailtime', 'admin'), get_string('configdigestmailtime', 'admin'), 17, array('00' => '00', '01' => '01', '02' => '02', '03' => '03', '04' => '04', '05' => '05', '06' => '06', '07' => '07', '08' => '08', '09' => '09', '10' => '10', '11' => '11', '12' => '12', '13' => '13', '14' => '14', '15' => '15', '16' => '16', '17' => '17', '18' => '18', '19' => '19', '20' => '20', '21' => '21', '22' => '22', '23' => '23')));
    $charsets = get_list_of_charsets();
    unset($charsets['UTF-8']);
    // not needed here
    $options = array();
    $options['0'] = 'UTF-8';
    $options = array_merge($options, $charsets);
    $temp->add(new admin_setting_configselect('sitemailcharset', get_string('sitemailcharset', 'admin'), get_string('configsitemailcharset', 'admin'), '0', $options));
    $temp->add(new admin_setting_configcheckbox('allowusermailcharset', get_string('allowusermailcharset', 'admin'), get_string('configallowusermailcharset', 'admin'), 0));
    $options = array('LF' => 'LF', 'CRLF' => 'CRLF');
    $temp->add(new admin_setting_configselect('mailnewline', get_string('mailnewline', 'admin'), get_string('configmailnewline', 'admin'), 'LF', $options));
    if (isloggedin()) {
        global $USER;
        $primaryadminemail = $USER->email;
        $primaryadminname = fullname($USER, true);

function xmldb_main_install()
{
    global $CFG, $DB, $SITE, $OUTPUT;
    /// make sure system context exists
    $syscontext = get_system_context(false);
    if ($syscontext->id != 1) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected new system context id!');
    }
    /// create site course
    $newsite = new stdClass();
    $newsite->fullname = '';
    $newsite->shortname = '';
    $newsite->summary = NULL;
    $newsite->newsitems = 3;
    $newsite->numsections = 0;
    $newsite->category = 0;
    $newsite->format = 'site';
    // Only for this course
    $newsite->timecreated = time();
    $newsite->timemodified = $newsite->timecreated;
    $newsite->id = $DB->insert_record('course', $newsite);
    $SITE = get_site();
    if ($newsite->id != 1 or $SITE->id != 1) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected new site course id!');
    }
    /// make sure site course context exists
    get_context_instance(CONTEXT_COURSE, $SITE->id);
    /// create default course category
    $cat = get_course_category();
    $defaults = array('rolesactive' => '0', 'auth' => 'email', 'auth_pop3mailbox' => 'INBOX', 'enrol_plugins_enabled' => 'manual,guest,self,cohort', 'theme' => theme_config::DEFAULT_THEME, 'filter_multilang_converted' => 1, 'siteidentifier' => random_string(32) . get_host_from_url($CFG->wwwroot), 'backup_version' => 2008111700, 'backup_release' => '2.0 dev', 'mnet_dispatcher_mode' => 'off', 'sessiontimeout' => 7200, 'stringfilters' => '', 'filterall' => 0, 'texteditors' => 'tinymce,textarea');
    foreach ($defaults as $key => $value) {
        set_config($key, $value);
    }
    /// bootstrap mnet
    $mnethost = new stdClass();
    $mnethost->wwwroot = $CFG->wwwroot;
    $mnethost->name = '';
    $mnethost->name = '';
    $mnethost->public_key = '';
    if (empty($_SERVER['SERVER_ADDR'])) {
        // SERVER_ADDR is only returned by Apache-like webservers
        preg_match("@^(?:http[s]?://)?([A-Z0-9\\-\\.]+).*@i", $CFG->wwwroot, $matches);
        $my_hostname = $matches[1];
        $my_ip = gethostbyname($my_hostname);
        // Returns unmodified hostname on failure. DOH!
        if ($my_ip == $my_hostname) {
            $mnethost->ip_address = 'UNKNOWN';
        } else {
            $mnethost->ip_address = $my_ip;
        }
    } else {
        $mnethost->ip_address = $_SERVER['SERVER_ADDR'];
    }
    $mnetid = $DB->insert_record('mnet_host', $mnethost);
    set_config('mnet_localhost_id', $mnetid);
    // Initial insert of mnet applications info
    $mnet_app = new stdClass();
    $mnet_app->name = 'moodle';
    $mnet_app->display_name = 'Moodle';
    $mnet_app->xmlrpc_server_url = '/mnet/xmlrpc/server.php';
    $mnet_app->sso_land_url = '/auth/mnet/land.php';
    $mnet_app->sso_jump_url = '/auth/mnet/jump.php';
    $moodleapplicationid = $DB->insert_record('mnet_application', $mnet_app);
    $mnet_app = new stdClass();
    $mnet_app->name = 'mahara';
    $mnet_app->display_name = 'Mahara';
    $mnet_app->xmlrpc_server_url = '/api/xmlrpc/server.php';
    $mnet_app->sso_land_url = '/auth/xmlrpc/land.php';
    $mnet_app->sso_jump_url = '/auth/xmlrpc/jump.php';
    $DB->insert_record('mnet_application', $mnet_app);
    // Set up the probably-to-be-removed-soon 'All hosts' record
    $mnetallhosts = new stdClass();
    $mnetallhosts->wwwroot = '';
    $mnetallhosts->ip_address = '';
    $mnetallhosts->public_key = '';
    $mnetallhosts->public_key_expires = 0;
    $mnetallhosts->last_connect_time = 0;
    $mnetallhosts->last_log_id = 0;
    $mnetallhosts->deleted = 0;
    $mnetallhosts->name = 'All Hosts';
    $mnetallhosts->applicationid = $moodleapplicationid;
    $mnetallhosts->id = $DB->insert_record('mnet_host', $mnetallhosts, true);
    set_config('mnet_all_hosts_id', $mnetallhosts->id);
    /// Create guest record - do not assign any role, guest user get's the default guest role automatically on the fly
    $guest = new stdClass();
    $guest->auth = 'manual';
    $guest->username = 'guest';
    $guest->password = hash_internal_user_password('guest');
    $guest->firstname = get_string('guestuser');
    $guest->lastname = ' ';
    $guest->email = 'root@localhost';
    $guest->description = get_string('guestuserinfo');
    $guest->mnethostid = $CFG->mnet_localhost_id;
    $guest->confirmed = 1;
    $guest->lang = $CFG->lang;
    $guest->timemodified = time();
    $guest->id = $DB->insert_record('user', $guest);
    if ($guest->id != 1) {
        echo $OUTPUT->notification('Unexpected id generated for the Guest account. Your database configuration or clustering setup may not be fully supported', 'notifyproblem');
    }
//.........这里部分代码省略.........

function xmldb_main_install()
{
    global $CFG, $DB, $SITE;
    /// make sure system context exists
    $syscontext = get_system_context(false);
    if ($syscontext->id != 1) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected system context id created!');
    }
    // create site course
    $newsite = new object();
    $newsite->fullname = "";
    $newsite->shortname = "";
    $newsite->summary = NULL;
    $newsite->newsitems = 3;
    $newsite->numsections = 0;
    $newsite->category = 0;
    $newsite->format = 'site';
    // Only for this course
    $newsite->teacher = get_string("defaultcourseteacher");
    $newsite->teachers = get_string("defaultcourseteachers");
    $newsite->student = get_string("defaultcoursestudent");
    $newsite->students = get_string("defaultcoursestudents");
    $newsite->timemodified = time();
    $DB->insert_record('course', $newsite);
    $SITE = get_site();
    if ($SITE->id != 1) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Unexpected site course id created!');
    }
    /// make sure site course context exists
    get_context_instance(CONTEXT_COURSE, $SITE->id);
    /// create default course category
    $cat = get_course_category();
    $defaults = array('rolesactive' => '0', 'auth' => 'email', 'auth_pop3mailbox' => 'INBOX', 'enrol' => 'manual', 'enrol_plugins_enabled' => 'manual', 'style' => 'default', 'template' => 'default', 'theme' => 'standardwhite', 'filter_multilang_converted' => 1, 'siteidentifier' => random_string(32) . get_host_from_url($CFG->wwwroot), 'backup_version' => 2008111700, 'backup_release' => '2.0 dev', 'blocks_version' => 2007081300, 'mnet_dispatcher_mode' => 'off', 'sessiontimeout' => 7200, 'stringfilters' => '', 'filterall' => 0, 'texteditors' => 'tinymce,textarea');
    foreach ($defaults as $key => $value) {
        set_config($key, $value);
    }
    /// bootstrap mnet
    $mnethost = new object();
    $mnethost->wwwroot = $CFG->wwwroot;
    $mnethost->name = '';
    $mnethost->name = '';
    $mnethost->public_key = '';
    if (empty($_SERVER['SERVER_ADDR'])) {
        // SERVER_ADDR is only returned by Apache-like webservers
        preg_match("@^(?:http[s]?://)?([A-Z0-9\\-\\.]+).*@i", $CFG->wwwroot, $matches);
        $my_hostname = $matches[1];
        $my_ip = gethostbyname($my_hostname);
        // Returns unmodified hostname on failure. DOH!
        if ($my_ip == $my_hostname) {
            $mnethost->ip_address = 'UNKNOWN';
        } else {
            $mnethost->ip_address = $my_ip;
        }
    } else {
        $mnethost->ip_address = $_SERVER['SERVER_ADDR'];
    }
    $mnetid = $DB->insert_record('mnet_host', $mnethost);
    set_config('mnet_localhost_id', $mnetid);
    // Initial insert of mnet applications info
    $mnet_app = new object();
    $mnet_app->name = 'moodle';
    $mnet_app->display_name = 'Moodle';
    $mnet_app->xmlrpc_server_url = '/mnet/xmlrpc/server.php';
    $mnet_app->sso_land_url = '/auth/mnet/land.php';
    $mnet_app->sso_jump_url = '/auth/mnet/land.php';
    $DB->insert_record('mnet_application', $mnet_app);
    $mnet_app = new object();
    $mnet_app->name = 'mahara';
    $mnet_app->display_name = 'Mahara';
    $mnet_app->xmlrpc_server_url = '/api/xmlrpc/server.php';
    $mnet_app->sso_land_url = '/auth/xmlrpc/land.php';
    $mnet_app->sso_jump_url = '/auth/xmlrpc/jump.php';
    $DB->insert_record('mnet_application', $mnet_app);
    /// insert log entries - replaces statements section in install.xml
    update_log_display_entry('user', 'view', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('course', 'user report', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('course', 'view', 'course', 'fullname');
    update_log_display_entry('course', 'update', 'course', 'fullname');
    update_log_display_entry('course', 'enrol', 'course', 'fullname');
    update_log_display_entry('course', 'unenrol', 'course', 'fullname');
    update_log_display_entry('course', 'report log', 'course', 'fullname');
    update_log_display_entry('course', 'report live', 'course', 'fullname');
    update_log_display_entry('course', 'report outline', 'course', 'fullname');
    update_log_display_entry('course', 'report participation', 'course', 'fullname');
    update_log_display_entry('course', 'report stats', 'course', 'fullname');
    update_log_display_entry('message', 'write', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('message', 'read', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('message', 'add contact', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('message', 'remove contact', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('message', 'block contact', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('message', 'unblock contact', 'user', 'CONCAT(firstname,\' \',lastname)');
    update_log_display_entry('group', 'view', 'groups', 'name');
    /// Create guest record
    $guest = new object();
    $guest->auth = 'manual';
    $guest->username = 'guest';
    $guest->password = hash_internal_user_password('guest');
    $guest->firstname = get_string('guestuser');
    $guest->lastname = ' ';
    $guest->email = 'root@localhost';
//.........这里部分代码省略.........

// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
defined('MOODLE_INTERNAL') || die;
if ($ADMIN->fulltree) {
    $settings->add(new admin_setting_heading('chat_method_heading', get_string('generalconfig', 'chat'), get_string('explaingeneralconfig', 'chat')));
    $options = array();
    $options['ajax'] = get_string('methodajax', 'chat');
    $options['header_js'] = get_string('methodnormal', 'chat');
    $options['sockets'] = get_string('methoddaemon', 'chat');
    $settings->add(new admin_setting_configselect('chat_method', get_string('method', 'chat'), get_string('configmethod', 'chat'), 'ajax', $options));
    $settings->add(new admin_setting_configtext('chat_refresh_userlist', get_string('refreshuserlist', 'chat'), get_string('configrefreshuserlist', 'chat'), 10, PARAM_INT));
    $settings->add(new admin_setting_configtext('chat_old_ping', get_string('oldping', 'chat'), get_string('configoldping', 'chat'), 35, PARAM_INT));
    $settings->add(new admin_setting_heading('chat_normal_heading', get_string('methodnormal', 'chat'), get_string('explainmethodnormal', 'chat')));
    $settings->add(new admin_setting_configtext('chat_refresh_room', get_string('refreshroom', 'chat'), get_string('configrefreshroom', 'chat'), 5, PARAM_INT));
    $options = array();
    $options['jsupdate'] = get_string('normalkeepalive', 'chat');
    $options['jsupdated'] = get_string('normalstream', 'chat');
    $settings->add(new admin_setting_configselect('chat_normal_updatemode', get_string('updatemethod', 'chat'), get_string('confignormalupdatemode', 'chat'), 'jsupdate', $options));
    $settings->add(new admin_setting_heading('chat_daemon_heading', get_string('methoddaemon', 'chat'), get_string('explainmethoddaemon', 'chat')));
    $settings->add(new admin_setting_configtext('chat_serverhost', get_string('serverhost', 'chat'), get_string('configserverhost', 'chat'), get_host_from_url($CFG->wwwroot)));
    $settings->add(new admin_setting_configtext('chat_serverip', get_string('serverip', 'chat'), get_string('configserverip', 'chat'), '127.0.0.1'));
    $settings->add(new admin_setting_configtext('chat_serverport', get_string('serverport', 'chat'), get_string('configserverport', 'chat'), 9111, PARAM_INT));
    $settings->add(new admin_setting_configtext('chat_servermax', get_string('servermax', 'chat'), get_string('configservermax', 'chat'), 100, PARAM_INT));
}