PHP core_useragent::is_ie方法代碼示例

 /**
  * @dataProvider user_agents_providers
  */
 public function test_useragent_ie($useragent, $tests)
 {
     // Setup the core_useragent instance.
     core_useragent::instance(true, $useragent);
     // IE Tests.
     if (isset($tests['is_ie']) && $tests['is_ie']) {
         $this->assertTrue(core_useragent::is_ie());
     } else {
         $this->assertFalse(core_useragent::is_ie());
     }
     $versions = array('0' => false, '5.0' => false, '5.5' => false, '6.0' => false, '7.0' => false, '8.0' => false, '9.0' => false, '10' => false, '11' => false, '12' => false, '13' => false, '14' => false);
     if (isset($tests['check_ie_version'])) {
         // The test provider has overwritten some of the above checks.
         // Must use the '+' operator, because array_merge will incorrectly rewrite the array keys for integer-based indexes.
         $versions = $tests['check_ie_version'] + $versions;
     }
     foreach ($versions as $version => $result) {
         $this->assertEquals($result, core_useragent::check_ie_version($version), "Version incorrectly determined for IE version '{$version}'");
     }
     // IE Compatibility mode.
     if (isset($tests['iecompatibility']) && $tests['iecompatibility']) {
         $this->assertTrue(core_useragent::check_ie_compatibility_view(), "IE Compability false negative");
     } else {
         $this->assertFalse(core_useragent::check_ie_compatibility_view(), "IE Compability false positive");
     }
 }

 protected function is_legacy_browser()
 {
     // IE8 and IE9 are the only supported browsers that do not have spellchecker.
     if (core_useragent::is_ie() and !core_useragent::check_ie_version(10)) {
         return true;
     }
     // The rest of browsers supports spellchecking or is horribly outdated and we do not care...
     return false;
 }

/**
 * Handles the sending of file data to the user's browser, including support for
 * byteranges etc.
 *
 * The $options parameter supports the following keys:
 *  (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
 *  (string|null) filename - overrides the implicit filename
 *  (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
 *      if this is passed as true, ignore_user_abort is called.  if you don't want your processing to continue on cancel,
 *      you must detect this case when control is returned using connection_aborted. Please not that session is closed
 *      and should not be reopened
 *  (string|null) cacheability - force the cacheability setting of the HTTP response, "private" or "public",
 *      when $lifetime is greater than 0. Cacheability defaults to "private" when logged in as other than guest; otherwise,
 *      defaults to "public".
 *
 * @category files
 * @param stored_file $stored_file local file object
 * @param int $lifetime Number of seconds before the file should expire from caches (null means $CFG->filelifetime)
 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
 * @param array $options additional options affecting the file serving
 * @return null script execution stopped unless $options['dontdie'] is true
 */
function send_stored_file($stored_file, $lifetime = null, $filter = 0, $forcedownload = false, array $options = array())
{
    global $CFG, $COURSE;
    if (empty($options['filename'])) {
        $filename = null;
    } else {
        $filename = $options['filename'];
    }
    if (empty($options['dontdie'])) {
        $dontdie = false;
    } else {
        $dontdie = true;
    }
    if ($lifetime === 'default' or is_null($lifetime)) {
        $lifetime = $CFG->filelifetime;
    }
    if (!empty($options['preview'])) {
        // replace the file with its preview
        $fs = get_file_storage();
        $preview_file = $fs->get_file_preview($stored_file, $options['preview']);
        if (!$preview_file) {
            // unable to create a preview of the file, send its default mime icon instead
            if ($options['preview'] === 'tinyicon') {
                $size = 24;
            } else {
                if ($options['preview'] === 'thumb') {
                    $size = 90;
                } else {
                    $size = 256;
                }
            }
            $fileicon = file_file_icon($stored_file, $size);
            send_file($CFG->dirroot . '/pix/' . $fileicon . '.png', basename($fileicon) . '.png');
        } else {
            // preview images have fixed cache lifetime and they ignore forced download
            // (they are generated by GD and therefore they are considered reasonably safe).
            $stored_file = $preview_file;
            $lifetime = DAYSECS;
            $filter = 0;
            $forcedownload = false;
        }
    }
    // handle external resource
    if ($stored_file && $stored_file->is_external_file() && !isset($options['sendcachedexternalfile'])) {
        $stored_file->send_file($lifetime, $filter, $forcedownload, $options);
        die;
    }
    if (!$stored_file or $stored_file->is_directory()) {
        // nothing to serve
        if ($dontdie) {
            return;
        }
        die;
    }
    if ($dontdie) {
        ignore_user_abort(true);
    }
    \core\session\manager::write_close();
    // Unlock session during file serving.
    $filename = is_null($filename) ? $stored_file->get_filename() : $filename;
    // Use given MIME type if specified.
    $mimetype = $stored_file->get_mimetype();
    // Otherwise guess it.
    if (!$mimetype || $mimetype === 'document/unknown') {
        $mimetype = get_mimetype_for_sending($filename);
    }
    // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
    if (core_useragent::is_ie()) {
        $filename = rawurlencode($filename);
    }
    if ($forcedownload) {
        header('Content-Disposition: attachment; filename="' . $filename . '"');
    } else {
        if ($mimetype !== 'application/x-shockwave-flash') {
            // If this is an swf don't pass content-disposition with filename as this makes the flash player treat the file
            // as an upload and enforces security that may prevent the file from being loaded.
            header('Content-Disposition: inline; filename="' . $filename . '"');
//.........這裏部分代碼省略.........

/**
 * Handles the sending of file data to the user's browser, including support for
 * byteranges etc.
 *
 * The $options parameter supports the following keys:
 *  (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
 *  (string|null) filename - overrides the implicit filename
 *  (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
 *      if this is passed as true, ignore_user_abort is called.  if you don't want your processing to continue on cancel,
 *      you must detect this case when control is returned using connection_aborted. Please not that session is closed
 *      and should not be reopened.
 *
 * @category files
 * @param stored_file $stored_file local file object
 * @param int $lifetime Number of seconds before the file should expire from caches (null means $CFG->filelifetime)
 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
 * @param array $options additional options affecting the file serving
 * @return null script execution stopped unless $options['dontdie'] is true
 */
function send_stored_file($stored_file, $lifetime = null, $filter = 0, $forcedownload = false, array $options = array())
{
    global $CFG, $COURSE;
    if (empty($options['filename'])) {
        $filename = null;
    } else {
        $filename = $options['filename'];
    }
    if (empty($options['dontdie'])) {
        $dontdie = false;
    } else {
        $dontdie = true;
    }
    if ($lifetime === 'default' or is_null($lifetime)) {
        $lifetime = $CFG->filelifetime;
    }
    if (!empty($options['preview'])) {
        // replace the file with its preview
        $fs = get_file_storage();
        $preview_file = $fs->get_file_preview($stored_file, $options['preview']);
        if (!$preview_file) {
            // unable to create a preview of the file, send its default mime icon instead
            if ($options['preview'] === 'tinyicon') {
                $size = 24;
            } else {
                if ($options['preview'] === 'thumb') {
                    $size = 90;
                } else {
                    $size = 256;
                }
            }
            $fileicon = file_file_icon($stored_file, $size);
            send_file($CFG->dirroot . '/pix/' . $fileicon . '.png', basename($fileicon) . '.png');
        } else {
            // preview images have fixed cache lifetime and they ignore forced download
            // (they are generated by GD and therefore they are considered reasonably safe).
            $stored_file = $preview_file;
            $lifetime = DAYSECS;
            $filter = 0;
            $forcedownload = false;
        }
    }
    // handle external resource
    if ($stored_file && $stored_file->is_external_file() && !isset($options['sendcachedexternalfile'])) {
        $stored_file->send_file($lifetime, $filter, $forcedownload, $options);
        die;
    }
    if (!$stored_file or $stored_file->is_directory()) {
        // nothing to serve
        if ($dontdie) {
            return;
        }
        die;
    }
    if ($dontdie) {
        ignore_user_abort(true);
    }
    \core\session\manager::write_close();
    // Unlock session during file serving.
    // Use given MIME type if specified, otherwise guess it using mimeinfo.
    // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
    // only Firefox saves all files locally before opening when content-disposition: attachment stated
    $filename = is_null($filename) ? $stored_file->get_filename() : $filename;
    $isFF = core_useragent::is_firefox();
    // only FF properly tested
    $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' : ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
    // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
    if (core_useragent::is_ie()) {
        $filename = rawurlencode($filename);
    }
    if ($forcedownload) {
        header('Content-Disposition: attachment; filename="' . $filename . '"');
    } else {
        header('Content-Disposition: inline; filename="' . $filename . '"');
    }
    if ($lifetime > 0) {
        $private = '';
        if (isloggedin() and !isguestuser()) {
            $private = ' private,';
        }
//.........這裏部分代碼省略.........

 /**
  * Will get called before the login page is shownr. Ff NTLM SSO
  * is enabled, and the user is in the right network, we'll redirect
  * to the magic NTLM page for SSO...
  *
  */
 function loginpage_hook()
 {
     global $CFG, $SESSION;
     // HTTPS is potentially required
     //httpsrequired(); - this must be used before setting the URL, it is already done on the login/index.php
     if (($_SERVER['REQUEST_METHOD'] === 'GET' || $_SERVER['REQUEST_METHOD'] === 'POST' && get_local_referer() != strip_querystring(qualified_me())) && !empty($this->config->ntlmsso_enabled) && !empty($this->config->ntlmsso_subnet) && empty($_GET['authldap_skipntlmsso']) && (isguestuser() || !isloggedin()) && address_in_subnet(getremoteaddr(), $this->config->ntlmsso_subnet)) {
         // First, let's remember where we were trying to get to before we got here
         if (empty($SESSION->wantsurl)) {
             $SESSION->wantsurl = null;
             $referer = get_local_referer(false);
             if ($referer && $referer != $CFG->wwwroot && $referer != $CFG->wwwroot . '/' && $referer != $CFG->httpswwwroot . '/login/' && $referer != $CFG->httpswwwroot . '/login/index.php') {
                 $SESSION->wantsurl = $referer;
             }
         }
         // Now start the whole NTLM machinery.
         if ($this->config->ntlmsso_ie_fastpath == AUTH_NTLM_FASTPATH_YESATTEMPT || $this->config->ntlmsso_ie_fastpath == AUTH_NTLM_FASTPATH_YESFORM) {
             if (core_useragent::is_ie()) {
                 $sesskey = sesskey();
                 redirect($CFG->wwwroot . '/auth/ldap/ntlmsso_magic.php?sesskey=' . $sesskey);
             } else {
                 if ($this->config->ntlmsso_ie_fastpath == AUTH_NTLM_FASTPATH_YESFORM) {
                     redirect($CFG->httpswwwroot . '/login/index.php?authldap_skipntlmsso=1');
                 }
             }
         }
         redirect($CFG->wwwroot . '/auth/ldap/ntlmsso_attempt.php');
     }
     // No NTLM SSO, Use the normal login page instead.
     // If $SESSION->wantsurl is empty and we have a 'Referer:' header, the login
     // page insists on redirecting us to that page after user validation. If
     // we clicked on the redirect link at the ntlmsso_finish.php page (instead
     // of waiting for the redirection to happen) then we have a 'Referer:' header
     // we don't want to use at all. As we can't get rid of it, just point
     // $SESSION->wantsurl to $CFG->wwwroot (after all, we came from there).
     if (empty($SESSION->wantsurl) && get_local_referer() == $CFG->httpswwwroot . '/auth/ldap/ntlmsso_finish.php') {
         $SESSION->wantsurl = $CFG->wwwroot;
     }
 }

 /**
  * Get the stylesheet URL of this theme.
  *
  * @param moodle_page $page Not used... deprecated?
  * @return moodle_url[]
  */
 public function css_urls(moodle_page $page)
 {
     global $CFG;
     $rev = theme_get_revision();
     $urls = array();
     $svg = $this->use_svg_icons();
     $separate = core_useragent::is_ie() && !core_useragent::check_ie_version('10');
     if ($rev > -1) {
         $url = new moodle_url("{$CFG->httpswwwroot}/theme/styles.php");
         if (!empty($CFG->slasharguments)) {
             $slashargs = '';
             if (!$svg) {
                 // We add a simple /_s to the start of the path.
                 // The underscore is used to ensure that it isn't a valid theme name.
                 $slashargs .= '/_s' . $slashargs;
             }
             $slashargs .= '/' . $this->name . '/' . $rev . '/all';
             if ($separate) {
                 $slashargs .= '/chunk0';
             }
             $url->set_slashargument($slashargs, 'noparam', true);
         } else {
             $params = array('theme' => $this->name, 'rev' => $rev, 'type' => 'all');
             if (!$svg) {
                 // We add an SVG param so that we know not to serve SVG images.
                 // We do this because all modern browsers support SVG and this param will one day be removed.
                 $params['svg'] = '0';
             }
             if ($separate) {
                 $params['chunk'] = '0';
             }
             $url->params($params);
         }
         $urls[] = $url;
     } else {
         $baseurl = new moodle_url($CFG->httpswwwroot . '/theme/styles_debug.php');
         $css = $this->get_css_files(true);
         if (!$svg) {
             // We add an SVG param so that we know not to serve SVG images.
             // We do this because all modern browsers support SVG and this param will one day be removed.
             $baseurl->param('svg', '0');
         }
         if ($separate) {
             // We might need to chunk long files.
             $baseurl->param('chunk', '0');
         }
         if (core_useragent::is_ie()) {
             // Lalala, IE does not allow more than 31 linked CSS files from main document.
             $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'plugins'));
             foreach ($css['parents'] as $parent => $sheets) {
                 // We need to serve parents individually otherwise we may easily exceed the style limit IE imposes (4096).
                 $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'parents', 'sheet' => $parent));
             }
             if (!empty($this->lessfile)) {
                 // No need to define the type as IE here.
                 $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'less'));
             }
             $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'theme'));
         } else {
             foreach ($css['plugins'] as $plugin => $unused) {
                 $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'plugin', 'subtype' => $plugin));
             }
             foreach ($css['parents'] as $parent => $sheets) {
                 foreach ($sheets as $sheet => $unused2) {
                     $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'parent', 'subtype' => $parent, 'sheet' => $sheet));
                 }
             }
             foreach ($css['theme'] as $sheet => $filename) {
                 if ($sheet === $this->lessfile) {
                     // This is the theme LESS file.
                     $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'less'));
                 } else {
                     // Sheet first in order to make long urls easier to read.
                     $urls[] = new moodle_url($baseurl, array('sheet' => $sheet, 'theme' => $this->name, 'type' => 'theme'));
                 }
             }
         }
     }
     return $urls;
 }

 * Configuration for Moodle's bootstrap theme.
 *
 * DO NOT MODIFY THIS THEME!
 * COPY IT FIRST, THEN RENAME THE COPY AND MODIFY IT INSTEAD.
 *
 * For full information about creating Moodle themes, see:
 * http://docs.moodle.org/dev/Themes_2.0
 *
 * @package   theme_bootstrapbase
 * @copyright 2013 Bas Brands. www.sonsbeekmedia.nl
 * @author    Bas Brands
 * @author    David Scotson
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
$THEME->doctype = 'html5';
$THEME->yuicssmodules = array();
$THEME->name = 'bootstrapbase';
$THEME->parents = array();
$THEME->sheets = array('moodle');
$THEME->supportscssoptimisation = false;
$THEME->enable_dock = false;
$THEME->editor_sheets = array('editor');
$THEME->rendererfactory = 'theme_overridden_renderer_factory';
$THEME->layouts = array('base' => array('file' => 'columns1.php', 'regions' => array()), 'standard' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre'), 'course' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre', 'options' => array('langmenu' => true)), 'coursecategory' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre'), 'incourse' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre'), 'frontpage' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre', 'options' => array('nonavbar' => true)), 'admin' => array('file' => 'columns2.php', 'regions' => array('side-pre'), 'defaultregion' => 'side-pre'), 'mydashboard' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre', 'options' => array('langmenu' => true)), 'mypublic' => array('file' => 'columns3.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre'), 'login' => array('file' => 'columns1.php', 'regions' => array(), 'options' => array('langmenu' => true)), 'popup' => array('file' => 'popup.php', 'regions' => array(), 'options' => array('nofooter' => true, 'nonavbar' => true)), 'frametop' => array('file' => 'columns1.php', 'regions' => array(), 'options' => array('nofooter' => true, 'nocoursefooter' => true)), 'embedded' => array('file' => 'embedded.php', 'regions' => array()), 'maintenance' => array('file' => 'maintenance.php', 'regions' => array()), 'print' => array('file' => 'columns1.php', 'regions' => array(), 'options' => array('nofooter' => true, 'nonavbar' => false)), 'redirect' => array('file' => 'embedded.php', 'regions' => array()), 'report' => array('file' => 'columns2.php', 'regions' => array('side-pre'), 'defaultregion' => 'side-pre'), 'secure' => array('file' => 'secure.php', 'regions' => array('side-pre', 'side-post'), 'defaultregion' => 'side-pre'));
$THEME->javascripts = array();
$THEME->javascripts_footer = array('moodlebootstrap', 'dock');
if (core_useragent::is_ie() && !core_useragent::check_ie_version('9.0')) {
    $THEME->javascripts[] = 'html5shiv';
}
$THEME->hidefromselector = true;
$THEME->blockrtlmanipulations = array('side-pre' => 'side-post', 'side-post' => 'side-pre');

 public function list_supported_urls(array $urls, array $options = array())
 {
     $extensions = $this->get_supported_extensions();
     $result = array();
     foreach ($urls as $url) {
         $ext = core_media::get_extension($url);
         if (in_array($ext, $extensions)) {
             if ($ext === 'ogg' || $ext === 'oga') {
                 // Formats .ogg and .oga are not supported in IE, Edge, or Safari.
                 if (core_useragent::is_ie() || core_useragent::is_edge() || core_useragent::is_safari()) {
                     continue;
                 }
             } else {
                 // Formats .aac, .mp3, and .m4a are not supported in Opera.
                 if (core_useragent::is_opera()) {
                     continue;
                 }
                 // Formats .mp3 and .m4a were not reliably supported in Firefox before 27.
                 // https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats
                 // has the details. .aac is still not supported.
                 if (core_useragent::is_firefox() && ($ext === 'aac' || !core_useragent::check_firefox_version(27))) {
                     continue;
                 }
             }
             // Old Android versions (pre 2.3.3) 'support' audio tag but no codecs.
             if (core_useragent::is_webkit_android() && !core_useragent::is_webkit_android('533.1')) {
                 continue;
             }
             $result[] = $url;
         }
     }
     return $result;
 }

 /**
  * Close the Moodle Workbook
  */
 public function close()
 {
     global $CFG;
     foreach ($this->objPHPExcel->getAllSheets() as $sheet) {
         $sheet->setSelectedCells('A1');
     }
     $this->objPHPExcel->setActiveSheetIndex(0);
     $filename = preg_replace('/\\.xlsx?$/i', '', $this->filename);
     $mimetype = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
     $filename = $filename . '.xlsx';
     if (is_https()) {
         // HTTPS sites - watch out for IE! KB812935 and KB316431.
         header('Cache-Control: max-age=10');
         header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
         header('Pragma: ');
     } else {
         //normal http - prevent caching at all cost
         header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
         header('Expires: ' . gmdate('D, d M Y H:i:s', 0) . ' GMT');
         header('Pragma: no-cache');
     }
     if (core_useragent::is_ie()) {
         $filename = rawurlencode($filename);
     } else {
         $filename = s($filename);
     }
     header('Content-Type: ' . $mimetype);
     header('Content-Disposition: attachment;filename="' . $filename . '"');
     $objWriter = PHPExcel_IOFactory::createWriter($this->objPHPExcel, $this->type);
     $objWriter->save('php://output');
 }

 public function list_supported_urls(array $urls, array $options = array())
 {
     $extensions = $this->get_supported_extensions();
     $result = array();
     foreach ($urls as $url) {
         $ext = core_media::get_extension($url);
         if (in_array($ext, $extensions)) {
             if ($ext === 'ogg' || $ext === 'oga') {
                 // Formats .ogg and .oga are not supported in IE or Safari.
                 if (core_useragent::is_ie() || core_useragent::is_safari()) {
                     continue;
                 }
             } else {
                 // Formats .aac, .mp3, and .m4a are not supported in Firefox or Opera.
                 if (core_useragent::is_firefox() || core_useragent::is_opera()) {
                     continue;
                 }
             }
             // Old Android versions (pre 2.3.3) 'support' audio tag but no codecs.
             if (core_useragent::is_webkit_android() && !core_useragent::is_webkit_android('533.1')) {
                 continue;
             }
             $result[] = $url;
         }
     }
     return $result;
 }

$PAGE->https_required();
$PAGE->set_context(context_system::instance());
$authsequence = get_enabled_auth_plugins(true);
// auths, in sequence
if (!in_array('ldap', $authsequence, true)) {
    print_error('ldap_isdisabled', 'auth');
}
$authplugin = get_auth_plugin('ldap');
if (empty($authplugin->config->ntlmsso_enabled)) {
    print_error('ntlmsso_isdisabled', 'auth_ldap');
}
$sesskey = required_param('sesskey', PARAM_RAW);
$file = $CFG->dirroot . '/pix/spacer.gif';
if ($authplugin->ntlmsso_magic($sesskey) && file_exists($file)) {
    if (!empty($authplugin->config->ntlmsso_ie_fastpath)) {
        if (core_useragent::is_ie()) {
            // $PAGE->https_required() up above takes care of what $CFG->httpswwwroot should be.
            redirect($CFG->httpswwwroot . '/auth/ldap/ntlmsso_finish.php');
        }
    }
    // Serve GIF
    // Type
    header('Content-Type: image/gif');
    header('Content-Length: ' . filesize($file));
    // Output file
    $handle = fopen($file, 'r');
    fpassthru($handle);
    fclose($handle);
    exit;
} else {
    print_error('ntlmsso_iwamagicnotenabled', 'auth_ldap');

 /**
  * Creates the block's main content
  *
  * @return string
  */
 public function get_content()
 {
     global $USER, $OUTPUT, $CFG;
     if (isset($this->content)) {
         return $this->content;
     }
     // Establish settings variables based on instance config.
     $showserverclock = !isset($this->config->show_clocks) || $this->config->show_clocks == B_SIMPLE_CLOCK_SHOW_BOTH || $this->config->show_clocks == B_SIMPLE_CLOCK_SHOW_SERVER_ONLY;
     $showuserclock = !isset($this->config->show_clocks) || $this->config->show_clocks == B_SIMPLE_CLOCK_SHOW_BOTH || $this->config->show_clocks == B_SIMPLE_CLOCK_SHOW_USER_ONLY;
     $showicons = !isset($this->config->show_icons) || $this->config->show_icons == 1;
     $showseconds = isset($this->config->show_seconds) && $this->config->show_seconds == 1;
     $showday = isset($this->config->show_day) && $this->config->show_day == 1;
     $show24hrtime = isset($this->config->twenty_four_hour_time) && $this->config->twenty_four_hour_time == 1;
     // Start the content, which is primarily a table.
     $this->content = new stdClass();
     $this->content->text = '';
     $this->content->footer = '';
     $table = new html_table();
     $table->attributes = array('class' => 'clockTable');
     // First item added is the server's clock.
     if ($showserverclock) {
         $row = array();
         if ($showicons) {
             $alt = get_string('server', 'block_simple_clock');
             $usingie = false;
             if (class_exists('core_useragent')) {
                 $usingie = core_useragent::is_ie();
             } else {
                 $usingie = check_browser_version('MSIE');
             }
             if ($usingie) {
                 $servericon = $OUTPUT->pix_icon('server', $alt, 'block_simple_clock');
             } else {
                 $servericon = $OUTPUT->pix_icon('favicon', $alt, 'theme');
             }
             $row[] = $servericon;
         }
         $row[] = get_string('server', 'block_simple_clock') . ':';
         $attributes = array();
         $attributes['class'] = 'clock';
         $attributes['id'] = 'block_progress_serverTime';
         $attributes['value'] = get_string('loading', 'block_simple_clock');
         $row[] = HTML_WRITER::empty_tag('input', $attributes);
         $table->data[] = $row;
     }
     // Next item is the user's clock.
     if ($showuserclock) {
         $row = array();
         if ($showicons) {
             if ($USER->id != 0) {
                 $userpictureparams = array('size' => 16, 'link' => false, 'alt' => 'User');
                 $userpicture = $OUTPUT->user_picture($USER, $userpictureparams);
                 $row[] = $userpicture;
             } else {
                 $row[] = '';
             }
         }
         $row[] = get_string('you', 'block_simple_clock') . ':';
         $attributes = array();
         $attributes['class'] = 'clock';
         $attributes['id'] = 'block_progress_youTime';
         $attributes['value'] = get_string('loading', 'block_simple_clock');
         $row[] = HTML_WRITER::empty_tag('input', $attributes);
         $table->data[] = $row;
     }
     $this->content->text .= HTML_WRITER::table($table);
     // Set up JavaScript code needed to keep the clock going.
     $noscriptstring = get_string('javascript_disabled', 'block_simple_clock');
     $this->content->text .= HTML_WRITER::tag('noscript', $noscriptstring);
     if ($CFG->timezone != 99) {
         // Ensure that the Moodle timezone is set correctly.
         $date = new DateTime('now', new DateTimeZone(core_date::normalise_timezone($CFG->timezone)));
         $moodletimeoffset = $date->getOffset();
         // + dst_offset_on(time(), $CFG->timezone);
         $servertimeoffset = date_offset_get(new DateTime());
         $timearray = localtime(time() + $moodletimeoffset - $servertimeoffset, true);
     } else {
         // Ensure that the server timezone is set.
         // From 2.9 onwards, this should never happen.
         $timearray = localtime(time(), true);
     }
     $arguments = array($showserverclock, $showuserclock, $showseconds, $showday, $show24hrtime, $timearray['tm_year'] + 1900, $timearray['tm_mon'], $timearray['tm_mday'], $timearray['tm_hour'], $timearray['tm_min'], $timearray['tm_sec'] + 2);
     $jsmodule = array('name' => 'block_simple_clock', 'fullpath' => '/blocks/simple_clock/module.js', 'requires' => array(), 'strings' => array(array('clock_separator', 'block_simple_clock'), array('before_noon', 'block_simple_clock'), array('after_noon', 'block_simple_clock'), array('day_names', 'block_simple_clock')));
     $this->page->requires->js_init_call('M.block_simple_clock.initSimpleClock', $arguments, false, $jsmodule);
     $this->content->footer = '';
     return $this->content;
 }

 /**
  * Modifies $_SERVER['HTTP_USER_AGENT'] manually to check if check_browser_version
  * works as expected.
  */
 public function test_check_browser_version()
 {
     core_useragent::instance(true, $this->user_agents['Safari']['412']['Mac OS X']);
     $this->assertTrue(core_useragent::is_safari());
     $this->assertTrue(core_useragent::check_safari_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_safari_version('312'));
     $this->assertFalse(core_useragent::check_safari_version('500'));
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::is_safari_ios());
     $this->assertFalse(core_useragent::check_safari_ios_version());
     core_useragent::instance(true, $this->user_agents['Safari iOS']['528']['iPhone']);
     $this->assertTrue(core_useragent::is_safari_ios());
     $this->assertTrue(core_useragent::check_safari_ios_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_safari_ios_version('527'));
     $this->assertFalse(core_useragent::check_safari_ios_version(590));
     $this->assertFalse(core_useragent::check_safari_version('312'));
     $this->assertFalse(core_useragent::check_safari_version('500'));
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['530']['Nexus']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['537']['Samsung GT-9505']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['537']['Nexus 5']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     core_useragent::instance(true, $this->user_agents['Chrome']['8']['Mac OS X']);
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_chrome_version(8));
     $this->assertFalse(core_useragent::check_chrome_version(10));
     $this->assertFalse(core_useragent::check_safari_version('1'));
     core_useragent::instance(true, $this->user_agents['Opera']['9.0']['Windows XP']);
     $this->assertTrue(core_useragent::is_opera());
     $this->assertTrue(core_useragent::check_opera_version());
     $this->assertTrue(core_useragent::check_opera_version('8.0'));
     $this->assertFalse(core_useragent::check_opera_version('10.0'));
     core_useragent::instance(true, $this->user_agents['MSIE']['6.0']['Windows XP SP2']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('7.0'));
     core_useragent::instance(true, $this->user_agents['MSIE']['5.0']['Windows 98']);
     $this->assertFalse(core_useragent::is_ie());
     $this->assertFalse(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version(0));
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('7.0'));
     core_useragent::instance(true, $this->user_agents['MSIE']['9.0']['Windows 7']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version(0));
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertTrue(core_useragent::check_ie_version('9.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('10'));
     core_useragent::instance(true, $this->user_agents['MSIE']['9.0i']['Windows 7']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version(0));
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertTrue(core_useragent::check_ie_version('9.0'));
     $this->assertTrue(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('10'));
     core_useragent::instance(true, $this->user_agents['MSIE']['10.0']['Windows 8']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
//.........這裏部分代碼省略.........

 /**
  * Get the stylesheet URL of this theme
  *
  * @param moodle_page $page Not used... deprecated?
  * @return array of moodle_url
  */
 public function css_urls(moodle_page $page)
 {
     global $CFG;
     $rev = theme_get_revision();
     $urls = array();
     $svg = $this->use_svg_icons();
     if ($rev > -1) {
         $url = new moodle_url("{$CFG->httpswwwroot}/theme/styles.php");
         $separate = core_useragent::is_ie() && !core_useragent::check_ie_version('10');
         if (!empty($CFG->slasharguments)) {
             $slashargs = '';
             if (!$svg) {
                 // We add a simple /_s to the start of the path.
                 // The underscore is used to ensure that it isn't a valid theme name.
                 $slashargs .= '/_s' . $slashargs;
             }
             $slashargs .= '/' . $this->name . '/' . $rev . '/all';
             if ($separate) {
                 $slashargs .= '/chunk0';
             }
             $url->set_slashargument($slashargs, 'noparam', true);
         } else {
             $params = array('theme' => $this->name, 'rev' => $rev, 'type' => 'all');
             if (!$svg) {
                 // We add an SVG param so that we know not to serve SVG images.
                 // We do this because all modern browsers support SVG and this param will one day be removed.
                 $params['svg'] = '0';
             }
             if ($separate) {
                 $params['chunk'] = '0';
             }
             $url->params($params);
         }
         $urls[] = $url;
     } else {
         // find out the current CSS and cache it now for 5 seconds
         // the point is to construct the CSS only once and pass it through the
         // dataroot to the script that actually serves the sheets
         if (!defined('THEME_DESIGNER_CACHE_LIFETIME')) {
             define('THEME_DESIGNER_CACHE_LIFETIME', 4);
             // this can be also set in config.php
         }
         $candidatedir = "{$CFG->cachedir}/theme/{$this->name}";
         if ($svg) {
             $candidatesheet = "{$candidatedir}/designer.ser";
         } else {
             $candidatesheet = "{$candidatedir}/designer_nosvg.ser";
         }
         $rebuild = true;
         if (file_exists($candidatesheet) and filemtime($candidatesheet) > time() - THEME_DESIGNER_CACHE_LIFETIME) {
             if ($css = file_get_contents($candidatesheet)) {
                 $css = unserialize($css);
                 if (is_array($css)) {
                     $rebuild = false;
                 }
             }
         }
         if ($rebuild) {
             // Prepare the CSS optimiser if it is to be used,
             // please note that it may be very slow and is therefore strongly discouraged in theme designer mode.
             $optimiser = null;
             if (!empty($CFG->enablecssoptimiser) && $this->supportscssoptimisation) {
                 require_once $CFG->dirroot . '/lib/csslib.php';
                 $optimiser = new css_optimiser();
             }
             $css = $this->css_content($optimiser);
             // We do not want any errors here because this may fail easily because of the concurrent access.
             $prevabort = ignore_user_abort(true);
             check_dir_exists($candidatedir);
             $tempfile = tempnam($candidatedir, 'tmpdesigner');
             file_put_contents($tempfile, serialize($css));
             $reporting = error_reporting(0);
             chmod($tempfile, $CFG->filepermissions);
             unlink($candidatesheet);
             // Do not rely on rename() deleting original, they may decide to change it at any time as usually.
             rename($tempfile, $candidatesheet);
             error_reporting($reporting);
             ignore_user_abort($prevabort);
         }
         $baseurl = new moodle_url($CFG->httpswwwroot . '/theme/styles_debug.php');
         if (!$svg) {
             // We add an SVG param so that we know not to serve SVG images.
             // We do this because all modern browsers support SVG and this param will one day be removed.
             $baseurl->param('svg', '0');
         }
         if (core_useragent::is_ie()) {
             // lalala, IE does not allow more than 31 linked CSS files from main document
             $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'plugins'));
             foreach ($css['parents'] as $parent => $sheets) {
                 // We need to serve parents individually otherwise we may easily exceed the style limit IE imposes (4096)
                 $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'parents', 'sheet' => $parent));
             }
             $urls[] = new moodle_url($baseurl, array('theme' => $this->name, 'type' => 'ie', 'subtype' => 'theme'));
         } else {
//.........這裏部分代碼省略.........

 /**
  * Modifies $_SERVER['HTTP_USER_AGENT'] manually to check if check_browser_version
  * works as expected.
  */
 public function test_check_browser_version()
 {
     core_useragent::instance(true, $this->user_agents['Safari']['412']['Mac OS X']);
     $this->assertTrue(core_useragent::is_safari());
     $this->assertTrue(core_useragent::check_safari_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_safari_version('312'));
     $this->assertFalse(core_useragent::check_safari_version('500'));
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::is_safari_ios());
     $this->assertFalse(core_useragent::check_safari_ios_version());
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['Safari iOS']['528']['iPhone']);
     $this->assertTrue(core_useragent::is_safari_ios());
     $this->assertTrue(core_useragent::check_safari_ios_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_safari_ios_version('527'));
     $this->assertFalse(core_useragent::check_safari_ios_version(590));
     $this->assertFalse(core_useragent::check_safari_version('312'));
     $this->assertFalse(core_useragent::check_safari_version('500'));
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['530']['Nexus']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     $this->assertFalse(core_useragent::is_chrome());
     $this->assertFalse(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['537']['Samsung GT-9505']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     core_useragent::instance(true, $this->user_agents['WebKit Android']['537']['Nexus 5']);
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_webkit_android_version('527'));
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertFalse(core_useragent::check_webkit_android_version(590));
     $this->assertFalse(core_useragent::is_safari());
     $this->assertFalse(core_useragent::check_safari_version());
     core_useragent::instance(true, $this->user_agents['Chrome']['8']['Mac OS X']);
     $this->assertTrue(core_useragent::is_chrome());
     $this->assertTrue(core_useragent::check_chrome_version());
     $this->assertTrue(core_useragent::is_webkit());
     $this->assertTrue(core_useragent::check_webkit_version());
     $this->assertTrue(core_useragent::check_chrome_version(8));
     $this->assertFalse(core_useragent::check_chrome_version(10));
     $this->assertFalse(core_useragent::check_safari_version('1'));
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['Opera']['9.0']['Windows XP']);
     $this->assertTrue(core_useragent::is_opera());
     $this->assertTrue(core_useragent::check_opera_version());
     $this->assertTrue(core_useragent::check_opera_version('8.0'));
     $this->assertFalse(core_useragent::check_opera_version('10.0'));
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['MSIE']['6.0']['Windows XP SP2']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('7.0'));
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['MSIE']['5.0']['Windows 98']);
     $this->assertFalse(core_useragent::is_ie());
     $this->assertFalse(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version(0));
     $this->assertTrue(core_useragent::check_ie_version('5.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('7.0'));
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['MSIE']['7.0']['Windows XP SP2']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version('7.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
     $this->assertFalse(core_useragent::check_ie_version('8.0'));
     $this->assertFalse(core_useragent::is_msword());
     core_useragent::instance(true, $this->user_agents['MSIE']['7.0b']['Windows XP']);
     $this->assertTrue(core_useragent::is_ie());
     $this->assertTrue(core_useragent::check_ie_version());
     $this->assertTrue(core_useragent::check_ie_version('7.0'));
     $this->assertFalse(core_useragent::check_ie_compatibility_view());
//.........這裏部分代碼省略.........