PHP check_browser_version函数代码示例

/**
 * Returns whether ajax is enabled/allowed or not.
 * @param array $browsers optional list of alowed browsers, empty means use default list
 * @return bool
 */
function ajaxenabled(array $browsers = null)
{
    global $CFG, $USER;
    if (!empty($browsers)) {
        $valid = false;
        foreach ($browsers as $brand => $version) {
            if (check_browser_version($brand, $version)) {
                $valid = true;
            }
        }
        if (!$valid) {
            return false;
        }
    }
    $ie = check_browser_version('MSIE', 6.0);
    $ff = check_browser_version('Gecko', 20051106);
    $op = check_browser_version('Opera', 9.0);
    $sa = check_browser_version('Safari', 412);
    if (!$ie && !$ff && !$op && !$sa) {
        /** @see http://en.wikipedia.org/wiki/User_agent */
        // Gecko build 20051107 is what is in Firefox 1.5.
        // We still have issues with AJAX in other browsers.
        return false;
    }
    if (!empty($CFG->enableajax) && (!empty($USER->ajax) || !isloggedin())) {
        return true;
    } else {
        return false;
    }
}

 protected function is_legacy_browser()
 {
     // IE8 and IE9 are the only supported browsers that do not have spellchecker.
     if (check_browser_version('MSIE', 5) and !check_browser_version('MSIE', 10)) {
         return true;
     }
     // The rest of browsers supports spellchecking or is horribly outdated and we do not care...
     return false;
 }

 protected function can_use_drag_and_drop()
 {
     global $USER;
     $ie = check_browser_version('MSIE', 6.0);
     $ff = check_browser_version('Gecko', 20051106);
     $op = check_browser_version('Opera', 9.0);
     $sa = check_browser_version('Safari', 412);
     $ch = check_browser_version('Chrome', 6);
     if (!$ie && !$ff && !$op && !$sa && !$ch or !empty($USER->screenreader)) {
         return false;
     }
     return true;
 }

    public function supported_by_browser() {
        if (check_browser_version('MSIE', 6)) {
            return true;
        }
        if (check_browser_version('Gecko', 20030516)) {
            return true;
        }
        if (check_browser_version('Safari', 412)) {
            return true;
        }
        if (check_browser_version('Chrome', 6)) {
            return true;
        }
        if (check_browser_version('Opera', 9)) {
            return true;
        }

        return false;
    }

 public function supported_by_browser()
 {
     if (check_browser_version('MSIE', 5.5)) {
         return true;
     } else {
         if (check_browser_version('Gecko', 20030516)) {
             return true;
         } else {
             if (check_browser_version('Safari', 3)) {
                 return true;
             } else {
                 if (check_browser_version('Opera', 9)) {
                     return true;
                 }
             }
         }
     }
     return true;
 }

 /**
  * Modifies $_SERVER['HTTP_USER_AGENT'] manually to check if check_browser_version 
  * works as expected.
  */
 function test_check_browser_version()
 {
     global $CFG;
     $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Safari']['2.0']['Mac OS X'];
     $this->assertTrue(check_browser_version('Safari', '312'));
     $this->assertFalse(check_browser_version('Safari', '500'));
     $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Opera']['9.0']['Windows XP'];
     $this->assertTrue(check_browser_version('Opera', '8.0'));
     $this->assertFalse(check_browser_version('Opera', '10.0'));
     $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['MSIE']['6.0']['Windows XP SP2'];
     $this->assertTrue(check_browser_version('MSIE', '5.0'));
     $this->assertFalse(check_browser_version('MSIE', '7.0'));
     $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['2.0']['Windows XP'];
     $this->assertTrue(check_browser_version('Firefox', '1.5'));
     $this->assertFalse(check_browser_version('Firefox', '3.0'));
 }

/**
 * Returns general link or file embedding html.
 * @param string $fullurl
 * @param string $title
 * @param string $clicktoopen
 * @return string html
 */
function resourcelib_embed_general($fullurl, $title, $clicktoopen, $mimetype)
{
    global $CFG, $PAGE;
    if ($fullurl instanceof moodle_url) {
        $fullurl = $fullurl->out();
    }
    $iframe = false;
    // IE can not embed stuff properly if stored on different server
    // that is why we use iframe instead, unfortunately this tag does not validate
    // in xhtml strict mode
    if ($mimetype === 'text/html' and check_browser_version('MSIE', 5)) {
        if (preg_match('(^https?://[^/]*)', $fullurl, $matches)) {
            if (strpos($CFG->wwwroot, $matches[0]) !== 0) {
                $iframe = true;
            }
        }
    }
    if ($iframe) {
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <iframe id="resourceobject" src="{$fullurl}">
    {$clicktoopen}
  </iframe>
</div>
EOT;
    } else {
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <object id="resourceobject" data="{$fullurl}" type="{$mimetype}"  width="800" height="600">
    <param name="src" value="{$fullurl}" />
    {$clicktoopen}
  </object>
</div>
EOT;
    }
    // the size is hardcoded in the boject obove intentionally because it is adjusted by the following function on-the-fly
    $PAGE->requires->js_init_call('M.util.init_maximised_embed', array('resourceobject'), true);
    return $code;
}

    $USER->editing = 1;
    $bodyclasses[] = 'krystle_persistent_edit';
}
if (!empty($PAGE->theme->settings->footnote)) {
    $footnote = $PAGE->theme->settings->footnote;
} else {
    $footnote = '<!-- There was no custom footnote set -->';
}
// Tell IE to use the latest engine (no Compatibility mode), if the user is using IE.
$ie = false;
if (class_exists('core_useragent')) {
    if (core_useragent::check_ie_version()) {
        $ie = true;
    }
} else {
    if (check_browser_version("MSIE", "0")) {
        $ie = true;
    }
}
if ($ie) {
    header('X-UA-Compatible: IE=edge');
}
//Settings for responsive design taken from Zebra theme
$userespond = $PAGE->theme->settings->userespond;
//Check the theme settings to see if respond.js should be called
$usecf = $PAGE->theme->settings->usecf;
//Check the theme settings to see if Chrome Frame should be called
$cfmaxversion = $PAGE->theme->settings->cfmaxversion;
//Check the theme settings to see which versions of IE get prompted for Chrome Frame
$ieversion = strpos($PAGE->bodyclasses, $cfmaxversion);
$usingie = strpos($PAGE->bodyclasses, 'ie ie');

/**
 * Handles the sending of file data to the user's browser, including support for
 * byteranges etc.
 *
 * @global object
 * @global object
 * @global object
 * @param object $stored_file local file object
 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
 * @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 string $filename Override filename
 * @param 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.
 * @return void no return or void, script execution stopped unless $dontdie is true
 */
function send_stored_file($stored_file, $lifetime = 86400, $filter = 0, $forcedownload = false, $filename = null, $dontdie = false)
{
    global $CFG, $COURSE, $SESSION;
    if (!$stored_file or $stored_file->is_directory()) {
        // nothing to serve
        if ($dontdie) {
            return;
        }
        die;
    }
    if ($dontdie) {
        ignore_user_abort(true);
    }
    session_get_instance()->write_close();
    // unlock session during fileserving
    // 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 = check_browser_version('Firefox', '1.5');
    // only FF > 1.5 properly tested
    $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' : ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
    $lastmodified = $stored_file->get_timemodified();
    $filesize = $stored_file->get_filesize();
    //try to disable automatic sid rewrite in cookieless mode
    @ini_set("session.use_trans_sid", "false");
    if ($lifetime > 0 && !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
        // get unixtime of request header; clip extra junk off first
        $since = strtotime(preg_replace('/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"]));
        if ($since && $since >= $lastmodified) {
            header('HTTP/1.1 304 Not Modified');
            header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
            header('Cache-Control: max-age=' . $lifetime);
            header('Content-Type: ' . $mimetype);
            if ($dontdie) {
                return;
            }
            die;
        }
    }
    //do not put '@' before the next header to detect incorrect moodle configurations,
    //error should be better than "weird" empty lines for admins/users
    //TODO: should we remove all those @ before the header()? Are all of the values supported on all servers?
    header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastmodified) . ' GMT');
    // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
    if (check_browser_version('MSIE')) {
        $filename = rawurlencode($filename);
    }
    if ($forcedownload) {
        header('Content-Disposition: attachment; filename="' . $filename . '"');
    } else {
        header('Content-Disposition: inline; filename="' . $filename . '"');
    }
    if ($lifetime > 0) {
        header('Cache-Control: max-age=' . $lifetime);
        header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
        header('Pragma: ');
        if (empty($CFG->disablebyteserving) && $mimetype != 'text/plain' && $mimetype != 'text/html') {
            header('Accept-Ranges: bytes');
            if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'], 'bytes=') !== FALSE) {
                // byteserving stuff - for acrobat reader and download accelerators
                // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
                // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
                $ranges = false;
                if (preg_match_all('/(\\d*)-(\\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
                    foreach ($ranges as $key => $value) {
                        if ($ranges[$key][1] == '') {
                            //suffix case
                            $ranges[$key][1] = $filesize - $ranges[$key][2];
                            $ranges[$key][2] = $filesize - 1;
                        } else {
                            if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
                                //fix range length
                                $ranges[$key][2] = $filesize - 1;
                            }
                        }
                        if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
                            //invalid byte-range ==> ignore header
                            $ranges = false;
                            break;
                        }
                        //prepare multipart header
//.........这里部分代码省略.........

/**
 * Determines if the HTML editor is enabled.
 *
 * This depends on site and user
 * settings, as well as the current browser being used.
 *
 * @return string|false Returns false if editor is not being used, otherwise
 * returns 'MSIE' or 'Gecko'.
 */
function can_use_html_editor()
{
    global $USER, $CFG;
    if (!empty($USER->htmleditor) and !empty($CFG->htmleditor)) {
        if (check_browser_version('MSIE', 5.5)) {
            return 'MSIE';
        } else {
            if (check_browser_version('Gecko', 20030516)) {
                return 'Gecko';
            }
        }
    }
    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.
 *
 * @category files
 * @param stored_file $stored_file local file object
 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
 * @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 = 86400, $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 {
        $dontdie = true;
    }
    if (!empty($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);
    }
    session_get_instance()->write_close();
    // unlock session during fileserving
    // 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 = check_browser_version('Firefox', '1.5');
    // only FF > 1.5 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 (check_browser_version('MSIE')) {
        $filename = rawurlencode($filename);
    }
    if ($forcedownload) {
        header('Content-Disposition: attachment; filename="' . $filename . '"');
    } else {
        header('Content-Disposition: inline; filename="' . $filename . '"');
    }
    if ($lifetime > 0) {
        header('Cache-Control: max-age=' . $lifetime);
        header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT');
        header('Pragma: ');
    } else {
        // Do not cache files in proxies and browsers
        if (strpos($CFG->wwwroot, 'https://') === 0) {
            //https sites - watch out for IE! KB812935 and KB316431
//.........这里部分代码省略.........

/**
 * Returns general link or file embedding html.
 *
 * @param string $fullurl
 * @param string $clicktoopen
 * @param string $mimetype
 * @return string html
 */
function equella_embed_general($equella)
{
    global $CFG, $PAGE;
    if ($CFG->equella_enable_lti) {
        $launchurl = new moodle_url('/mod/equella/ltilaunch.php', array('cmid' => $equella->cmid, 'action' => 'view'));
        $url = $launchurl->out();
    } else {
        $url = equella_appendtoken($equella->url);
    }
    $link = html_writer::tag('a', $equella->name, array('href' => str_replace('&', '&', $url)));
    $clicktoopen = get_string('clicktoopen', 'equella', $link);
    $iframe = false;
    // IE can not embed stuff properly, that is why we use iframe instead.
    // Unfortunately this tag does not validate in xhtml strict mode,
    // but in any case it is undeprecated in HTML 5 - we will use it everywhere soon!
    $ie5 = false;
    $vendor = 'MSIE';
    $version = 5;
    if (method_exists('core_useragent', 'check_browser_version')) {
        $ie5 = core_useragent::check_browser_version($vendor, $version);
    } else {
        $ie5 = check_browser_version($vendor, $version);
    }
    if ($ie5 || $CFG->equella_enable_lti) {
        $iframe = true;
    }
    if ($iframe) {
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <iframe id="resourceobject" src="{$url}">
    {$clicktoopen}
  </iframe>
</div>
EOT;
    } else {
        $param = '<param name="src" value="' . $url . '" />';
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <object id="resourceobject" data="{$url}" width="800" height="600">
    {$param}
    {$clicktoopen}
  </object>
</div>
EOT;
    }
    // the size is hardcoded in the object above intentionally because it is adjusted by the following function on-the-fly
    $PAGE->requires->js_init_call('M.util.init_maximised_embed', array('resourceobject'), true);
    return $code;
}

/**
 * Returns general link or file embedding html.
 * @param string $fullurl
 * @param string $title
 * @param string $clicktoopen
 * @param string $mimetype
 * @return string html
 */
function resourcelib_embed_general($fullurl, $title, $clicktoopen, $mimetype)
{
    global $CFG, $PAGE;
    if ($fullurl instanceof moodle_url) {
        $fullurl = $fullurl->out();
    }
    $iframe = false;
    $param = '<param name="src" value="' . $fullurl . '" />';
    // IE can not embed stuff properly, that is why we use iframe instead.
    // Unfortunately this tag does not validate in xhtml strict mode,
    // but in any case it is undeprecated in HTML 5 - we will use it everywhere soon!
    if ($mimetype === 'text/html' and check_browser_version('MSIE', 5)) {
        $iframe = true;
    }
    if ($iframe) {
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <iframe id="resourceobject" src="{$fullurl}">
    {$clicktoopen}
  </iframe>
</div>
EOT;
    } else {
        $code = <<<EOT
<div class="resourcecontent resourcegeneral">
  <object id="resourceobject" data="{$fullurl}" type="{$mimetype}"  width="800" height="600">
    {$param}
    {$clicktoopen}
  </object>
</div>
EOT;
    }
    // the size is hardcoded in the boject obove intentionally because it is adjusted by the following function on-the-fly
    $PAGE->requires->js_init_call('M.util.init_maximised_embed', array('resourceobject'), true);
    return $code;
}

 /**
  * Returns whether or not to display fixed students column.
  * Includes a browser check, because IE6 doesn't support the scrollbar.
  *
  * @return bool
  */
 public function is_fixed_students()
 {
     global $USER, $CFG;
     return $CFG->grade_report_fixedstudents && (check_browser_version('MSIE', '7.0') || check_browser_version('Firefox', '2.0') || check_browser_version('Gecko', '2006010100') || check_browser_version('Camino', '1.0') || check_browser_version('Opera', '6.0') || check_browser_version('Chrome', '6') || check_browser_version('Safari', '300'));
 }

 /**
  * Get the user dashboard report view.
  *
  * @uses $CFG, $CURMAN
  * @param none
  * @return string The HTML for the dashboard report.
  */
 function get_dashboard()
 {
     global $CFG, $CURMAN;
     require_once CURMAN_DIRLOCATION . '/lib/curriculumstudent.class.php';
     //needed for AJAX calls
     require_js(array('yui_yahoo', 'yui_dom', 'yui_event', 'yui_connection', "{$CFG->wwwroot}/curriculum/js/util.js", "{$CFG->wwwroot}/curriculum/js/dashboard.js"), true);
     if (optional_param('tab', '', PARAM_CLEAN) == 'archivedlp') {
         $tab = 'archivedlp';
         $show_archived = 1;
     } else {
         $tab = 'currentlp';
         $show_archived = 0;
     }
     $content = '';
     $archive_var = '_elis_curriculum_archive';
     $totalcourses = 0;
     $totalcurricula = 0;
     $completecourses = 0;
     $curriculas = array();
     $classids = array();
     $sql = 'SELECT curstu.id, curstu.curriculumid as curid, cur.name as name
               FROM ' . $CURMAN->db->prefix_table(CURASSTABLE) . ' curstu
               JOIN ' . $CURMAN->db->prefix_table(CURTABLE) . ' cur
                 ON cur.id = curstu.curriculumid
              WHERE curstu.userid = \'' . $this->id . '\' ORDER BY cur.priority ASC, cur.name ASC';
     if ($usercurs = get_records_sql($sql)) {
         foreach ($usercurs as $usercur) {
             // Check if this curricula is set as archived and whether we want to display it
             $crlm_context = get_context_instance(context_level_base::get_custom_context_level('curriculum', 'block_curr_admin'), $usercur->curid);
             $data_array = field_data::get_for_context_and_field($crlm_context, $archive_var);
             $crlm_archived = 0;
             if (is_array($data_array) && !empty($data_array)) {
                 foreach ($data_array as $data_key => $data_obj) {
                     $crlm_archived = !empty($data_obj->data) ? 1 : 0;
                 }
             }
             if ($show_archived == $crlm_archived) {
                 $totalcurricula++;
                 $curriculas[$usercur->curid]['id'] = $usercur->curid;
                 $curriculas[$usercur->curid]['name'] = $usercur->name;
                 $data = array();
                 if ($courses = curriculumcourse_get_listing($usercur->curid, 'curcrs.position, crs.name', 'ASC')) {
                     foreach ($courses as $course) {
                         $totalcourses++;
                         $course_obj = new course($course->courseid);
                         $coursedesc = $course_obj->syllabus;
                         if ($cdata = student_get_class_from_course($course->courseid, $this->id)) {
                             foreach ($cdata as $classdata) {
                                 if (!in_array($classdata->id, $classids)) {
                                     $classids[] = $classdata->id;
                                 }
                                 if ($classdata->completestatusid == STUSTATUS_PASSED) {
                                     $completecourses++;
                                 }
                                 if ($mdlcrs = moodle_get_course($classdata->id)) {
                                     $coursename = '<a href="' . $CFG->wwwroot . '/course/view.php?id=' . $mdlcrs . '">' . $course->coursename . '</a>';
                                 } else {
                                     $coursename = $course->coursename;
                                 }
                                 $data[] = array($coursename, $coursedesc, $classdata->grade, $classdata->completestatusid == STUSTATUS_PASSED ? get_string('yes') : get_string('no'), $classdata->completestatusid == STUSTATUS_PASSED && !empty($classdata->completetime) ? date('M j, Y', $classdata->completetime) : get_string('na', 'block_curr_admin'));
                             }
                         } else {
                             $data[] = array($course->coursename, $coursedesc, 0, get_string('no'), get_string('na', 'block_curr_admin'));
                         }
                     }
                 }
                 $curriculas[$usercur->curid]['data'] = $data;
             } else {
                 // Keep note of the classid's regardless if set archived or not for later use in determining non-curricula courses
                 if ($courses = curriculumcourse_get_listing($usercur->curid, 'curcrs.position, crs.name', 'ASC')) {
                     foreach ($courses as $course) {
                         if ($cdata = student_get_class_from_course($course->courseid, $this->id)) {
                             foreach ($cdata as $classdata) {
                                 if (!in_array($classdata->id, $classids)) {
                                     $classids[] = $classdata->id;
                                 }
                             }
                         }
                     }
                 }
             }
         }
     }
     // Show different css for IE below version 8
     if (check_browser_version('MSIE', 7.0) && !check_browser_version('MSIE', 8.0)) {
         // IEs that are lower than version 8 do not get the float because it messes up the tabs at the top of the page for some reason
         $float_style = 'text-align:right;';
     } else {
         // Sane browsers get the float tag
         $float_style = 'text-align:right; float:right;';
     }
     // Tab header
     $field_exists = field::get_for_context_level_with_name('curriculum', $archive_var);
//.........这里部分代码省略.........