MDL-40931 useragent: separated user agent functionality into a lib

This commit moves user agent related functionality out of several
core libraries and combines it into a more manageable class.
All core uses are converted and functions deprecated in favor
of the new class.

auth/ldap/auth.php

@@ -1646,8 +1646,7 @@ class auth_plugin_ldap extends auth_plugin_base {
             // 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(check_browser_version('MSIE')) {
+                if (core_useragent::check_ie_version()) {
                     $sesskey = sesskey();
                     redirect($CFG->wwwroot.'/auth/ldap/ntlmsso_magic.php?sesskey='.$sesskey);
                 } else if ($this->config->ntlmsso_ie_fastpath == AUTH_NTLM_FASTPATH_YESFORM) {

auth/ldap/ntlmsso_magic.php

@@ -28,7 +28,7 @@ $file = $CFG->dirroot.'/pix/spacer.gif';
 
 if ($authplugin->ntlmsso_magic($sesskey) && file_exists($file)) {
     if (!empty($authplugin->config->ntlmsso_ie_fastpath)) {
-        if (check_browser_version('MSIE')) {
+        if (core_useragent::check_ie_version()) {
             // $PAGE->https_required() up above takes care of what $CFG->httpswwwroot should be.
             redirect($CFG->httpswwwroot.'/auth/ldap/ntlmsso_finish.php');
         }

course/view.php

@@ -219,8 +219,10 @@
         redirect($CFG->wwwroot .'/');
     }
 
+    $ajaxenabled = ajaxenabled();
+
     $completion = new completion_info($course);
-    if ($completion->is_enabled() && ajaxenabled()) {
+    if ($completion->is_enabled() && $ajaxenabled) {
         $PAGE->requires->string_for_js('completion-title-manual-y', 'completion');
         $PAGE->requires->string_for_js('completion-title-manual-n', 'completion');
         $PAGE->requires->string_for_js('completion-alt-manual-y', 'completion');
@@ -241,7 +243,7 @@
     $PAGE->set_heading($course->fullname);
     echo $OUTPUT->header();
 
-    if ($completion->is_enabled() && ajaxenabled()) {
+    if ($completion->is_enabled() && $ajaxenabled) {
         // This value tracks whether there has been a dynamic change to the page.
         // It is used so that if a user does this - (a) set some tickmarks, (b)
         // go to another page, (c) clicks Back button - the page will

grade/report/grader/lib.php

@@ -1582,15 +1582,15 @@ class grade_report_grader extends grade_report {
      * @return bool
      */
     public function is_fixed_students() {
-        global $USER, $CFG;
+        global $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'));
+            (core_useragent::check_ie_version('7.0') ||
+             core_useragent::check_firefox_version('2.0') ||
+             core_useragent::check_gecko_version('2006010100') ||
+             core_useragent::check_camino_version('1.0') ||
+             core_useragent::check_opera_version('6.0') ||
+             core_useragent::check_chrome_version('6') ||
+             core_useragent::check_safari_version('300'));
     }
 
     /**

group/index.php

@@ -152,7 +152,8 @@ $currenttab = 'groups';
 require('tabs.php');
 
 $disabled = 'disabled="disabled"';
-if (ajaxenabled()) {
+$ajaxenabled = ajaxenabled();
+if ($ajaxenabled) {
     // Some buttons are enabled if single group selected
     $showaddmembersform_disabled = $singlegroup ? '' : $disabled;
     $showeditgroupsettingsform_disabled = $singlegroup ? '' : $disabled;
@@ -178,7 +179,7 @@ echo '<tr>'."\n";
 echo "<td>\n";
 echo '<p><label for="groups"><span id="groupslabel">'.get_string('groups').':</span><span id="thegrouping">&nbsp;</span></label></p>'."\n";
 
-if (ajaxenabled()) { // TODO: move this to JS init!
+if ($ajaxenabled) { // TODO: move this to JS init!
     $onchange = 'M.core_group.membersCombo.refreshMembers();';
 } else {
     $onchange = '';
@@ -275,7 +276,7 @@ echo '</table>'."\n";
 echo '</div>'."\n";
 echo '</form>'."\n";
 
-if (ajaxenabled()) {
+if ($ajaxenabled) {
     $PAGE->requires->js_init_call('M.core_group.init_index', array($CFG->wwwroot, $courseid));
     $PAGE->requires->js_init_call('M.core_group.groupslist', array($preventgroupremoval));
 }

lib/ajax/tests/ajaxlib_test.php

-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (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/>.
-
-/**
- * Unit tests for (some of) ../ajaxlib.php.
- *
- * @package   core
- * @category  phpunit
- * @copyright 2009 Tim Hunt
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-defined('MOODLE_INTERNAL') || die();
-
-global $CFG;
-require_once($CFG->libdir . '/ajax/ajaxlib.php');
-
-
-/**
- * Unit tests for ../ajaxlib.php functions.
- *
- * @copyright 2008 Tim Hunt
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class core_ajaxlib_testcase extends advanced_testcase {
-
-    var $user_agents = array(
-        'MSIE' => array(
-            '5.5' => array('Windows 2000' => 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)'),
-            '6.0' => array('Windows XP SP2' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)'),
-            '7.0' => array('Windows XP SP2' => 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; YPC 3.0.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)')
-        ),
-        'Firefox' => array(
-            '1.0.6'   => array('Windows XP' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6'),
-            '1.5'     => array('Windows XP' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; nl; rv:1.8) Gecko/20051107 Firefox/1.5'),
-            '1.5.0.1' => array('Windows XP' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1'),
-            '2.0'     => array('Windows XP' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1',
-                'Ubuntu Linux AMD64' => 'Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1) Gecko/20060601 Firefox/2.0 (Ubuntu-edgy)')
-        ),
-        'Safari' => array(
-            '312' => array('Mac OS X' => 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-us) AppleWebKit/312.1 (KHTML, like Gecko) Safari/312'),
-            '2.0' => array('Mac OS X' => 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/412 (KHTML, like Gecko) Safari/412')
-        ),
-        'Opera' => array(
-            '8.51' => array('Windows XP' => 'Opera/8.51 (Windows NT 5.1; U; en)'),
-            '9.0'  => array('Windows XP' => 'Opera/9.0 (Windows NT 5.1; U; en)',
-                'Debian Linux' => 'Opera/9.01 (X11; Linux i686; U; en)')
-        )
-    );
-
-    /**
-     * Uses the array of user agents to test ajax_lib::ajaxenabled
-     */
-    function test_ajaxenabled() {
-        global $CFG;
-
-        $this->resetAfterTest(true);
-
-        $CFG->enableajax = 1;
-
-        // Should be true
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['2.0']['Windows XP'];
-        $this->assertTrue(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['1.5']['Windows XP'];
-        $this->assertTrue(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Safari']['2.0']['Mac OS X'];
-        $this->assertTrue(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Opera']['9.0']['Windows XP'];
-        $this->assertTrue(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['MSIE']['6.0']['Windows XP SP2'];
-        $this->assertTrue(ajaxenabled());
-
-        // Should be false
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['1.0.6']['Windows XP'];
-        $this->assertFalse(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Safari']['312']['Mac OS X'];
-        $this->assertFalse(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Opera']['8.51']['Windows XP'];
-        $this->assertFalse(ajaxenabled());
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['MSIE']['5.5']['Windows 2000'];
-        $this->assertFalse(ajaxenabled());
-
-        // Test array of tested browsers
-        $tested_browsers = array('MSIE' => 6.0, 'Gecko' => 20061111);
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['2.0']['Windows XP'];
-        $this->assertTrue(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['MSIE']['7.0']['Windows XP SP2'];
-        $this->assertTrue(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Safari']['2.0']['Mac OS X'];
-        $this->assertFalse(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Opera']['9.0']['Windows XP'];
-        $this->assertFalse(ajaxenabled($tested_browsers));
-
-        $tested_browsers = array('Safari' => 412, 'Opera' => 9.0);
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Firefox']['2.0']['Windows XP'];
-        $this->assertFalse(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['MSIE']['7.0']['Windows XP SP2'];
-        $this->assertFalse(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Safari']['2.0']['Mac OS X'];
-        $this->assertTrue(ajaxenabled($tested_browsers));
-
-        $_SERVER['HTTP_USER_AGENT'] = $this->user_agents['Opera']['9.0']['Windows XP'];
-        $this->assertTrue(ajaxenabled($tested_browsers));
-    }
-}

lib/deprecatedlib.php

@@ -4419,3 +4419,117 @@ function get_plugin_list_with_file($plugintype, $file, $include = false) {
         DEBUG_DEVELOPER);
     return core_component::get_plugin_list_with_file($plugintype, $file, $include);
 }
+
+/**
+ * Checks to see if is the browser operating system matches the specified brand.
+ *
+ * Known brand: 'Windows','Linux','Macintosh','SGI','SunOS','HP-UX'
+ *
+ * @deprecated since 2.6
+ * @param string $brand The operating system identifier being tested
+ * @return bool true if the given brand below to the detected operating system
+ */
+function check_browser_operating_system($brand) {
+    debugging('check_browser_operating_system has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::check_browser_operating_system($brand);
+}
+
+/**
+ * Checks to see if is a browser matches the specified
+ * brand and is equal or better version.
+ *
+ * @deprecated since 2.6
+ * @param string $brand The browser identifier being tested
+ * @param int $version The version of the browser, if not specified any version (except 5.5 for IE for BC reasons)
+ * @return bool true if the given version is below that of the detected browser
+ */
+function check_browser_version($brand, $version = null) {
+    debugging('check_browser_version has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::check_browser_version($brand, $version);
+}
+
+/**
+ * Returns whether a device/browser combination is mobile, tablet, legacy, default or the result of
+ * an optional admin specified regular expression.  If enabledevicedetection is set to no or not set
+ * it returns default
+ *
+ * @deprecated since 2.6
+ * @return string device type
+ */
+function get_device_type() {
+    debugging('get_device_type has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_device_type();
+}
+
+/**
+ * Returns a list of the device types supporting by Moodle
+ *
+ * @deprecated since 2.6
+ * @param boolean $incusertypes includes types specified using the devicedetectregex admin setting
+ * @return array $types
+ */
+function get_device_type_list($incusertypes = true) {
+    debugging('get_device_type_list has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_device_type_list($incusertypes);
+}
+
+/**
+ * Returns the theme selected for a particular device or false if none selected.
+ *
+ * @deprecated since 2.6
+ * @param string $devicetype
+ * @return string|false The name of the theme to use for the device or the false if not set
+ */
+function get_selected_theme_for_device_type($devicetype = null) {
+    debugging('get_selected_theme_for_device_type has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_device_type_theme($devicetype);
+}
+
+/**
+ * Returns the name of the device type theme var in $CFG because there is not a convention to allow backwards compatibility.
+ *
+ * @deprecated since 2.6
+ * @param string $devicetype
+ * @return string The config variable to use to determine the theme
+ */
+function get_device_cfg_var_name($devicetype = null) {
+    debugging('get_device_cfg_var_name has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_device_type_cfg_var_name($devicetype);
+}
+
+/**
+ * Allows the user to switch the device they are seeing the theme for.
+ * This allows mobile users to switch back to the default theme, or theme for any other device.
+ *
+ * @deprecated since 2.6
+ * @param string $newdevice The device the user is currently using.
+ * @return string The device the user has switched to
+ */
+function set_user_device_type($newdevice) {
+    debugging('set_user_device_type has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::set_user_device_type($newdevice);
+}
+
+/**
+ * Returns the device the user is currently using, or if the user has chosen to switch devices
+ * for the current device type the type they have switched to.
+ *
+ * @deprecated since 2.6
+ * @return string The device the user is currently using or wishes to use
+ */
+function get_user_device_type() {
+    debugging('get_user_device_type has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_user_device_type();
+}
+
+/**
+ * Returns one or several CSS class names that match the user's browser. These can be put
+ * in the body tag of the page to apply browser-specific rules without relying on CSS hacks
+ *
+ * @deprecated since 2.6
+ * @return array An array of browser version classes
+ */
+function get_browser_version_classes() {
+    debugging('get_browser_version_classes has been deprecated, please update your code to use core_useragent instead.', DEBUG_DEVELOPER);
+    return core_useragent::get_browser_version_classes();
+}
\ No newline at end of file

lib/editor/tinymce/lib.php

@@ -34,25 +34,25 @@ class tinymce_texteditor extends texteditor {
      * @return bool
      */
     public function supported_by_browser() {
-        if (check_browser_version('MSIE', 6)) {
+        if (core_useragent::check_ie_version(6)) {
             return true;
         }
-        if (check_browser_version('Gecko', 20030516)) {
+        if (core_useragent::check_firefox_version(20030516)) {
             return true;
         }
-        if (check_browser_version('Safari', 412)) {
+        if (core_useragent::check_safari_version(412)) {
             return true;
         }
-        if (check_browser_version('Chrome', 6)) {
+        if (core_useragent::check_chrome_version(6)) {
             return true;
         }
-        if (check_browser_version('Opera', 9)) {
+        if (core_useragent::check_opera_version(9)) {
             return true;
         }
-        if (check_browser_version('Safari iOS', 534)) {
+        if (core_useragent::check_safari_ios_version(534)) {
             return true;
         }
-        if (check_browser_version('WebKit', 534)) {
+        if (core_useragent::check_webkit_version(534)) {
             return true;
         }
 

lib/editor/tinymce/plugins/spellchecker/lib.php

@@ -63,7 +63,7 @@ class tinymce_spellchecker extends editor_tinymce_plugin {
 
     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)) {
+        if (core_useragent::check_ie_version() and !core_useragent::check_ie_version(10)) {
             return true;
         }
         // The rest of browsers supports spellchecking or is horribly outdated and we do not care...

lib/excellib.class.php

@@ -120,7 +120,7 @@ class MoodleExcelWorkbook {
             header('Pragma: no-cache');
         }
 
-        if (check_browser_version('MSIE')) {
+        if (core_useragent::check_ie_version()) {
             $filename = rawurlencode($filename);
         } else {
             $filename = s($filename);

lib/filelib.php

@@ -2101,7 +2101,7 @@ function readstring_accel($string, $mimetype, $accelerate) {
 function send_temp_file($path, $filename, $pathisstring=false) {
     global $CFG;
 
-    if (check_browser_version('Firefox', '1.5')) {
+    if (core_useragent::check_firefox_version('1.5')) {
         // only FF is known to correctly save to disk before opening...
         $mimetype = mimeinfo('type', $filename);
     } else {
@@ -2121,7 +2121,7 @@ function send_temp_file($path, $filename, $pathisstring=false) {
     }
 
     // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
-    if (check_browser_version('MSIE')) {
+    if (core_useragent::check_ie_version()) {
         $filename = urlencode($filename);
     }
 
@@ -2197,12 +2197,12 @@ function send_file($path, $filename, $lifetime = 'default' , $filter=0, $pathiss
     // 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
-    $isFF         = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
+    $isFF         = core_useragent::check_firefox_version('1.5'); // only FF > 1.5 properly tested
     $mimetype     = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
                          ($mimetype ? $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')) {
+    if (core_useragent::check_ie_version()) {
         $filename = rawurlencode($filename);
     }
 
@@ -2361,12 +2361,12 @@ function send_stored_file($stored_file, $lifetime=86400 , $filter=0, $forcedownl
     // 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
+    $isFF         = core_useragent::check_firefox_version('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')) {
+    if (core_useragent::check_ie_version()) {
         $filename = rawurlencode($filename);
     }
 

lib/medialib.php

@@ -983,8 +983,8 @@ class core_media_player_html5video extends core_media_player {
     public function embed($urls, $name, $width, $height, $options) {
         // Special handling to make videos play on Android devices pre 2.3.
         // Note: I tested and 2.3.3 (in emulator) works without, is 533.1 webkit.
-        $oldandroid = check_browser_version('WebKit Android') &&
-                !check_browser_version('WebKit Android', '533.1');
+        $oldandroid = core_useragent::check_webkit_android_version() &&
+                !core_useragent::check_webkit_android_version('533.1');
 
         // Build array of source tags.
         $sources = array();
@@ -1067,12 +1067,12 @@ OET;
                 // versions or manual plugins.
                 if ($ext === 'ogv' || $ext === 'webm') {
                     // Formats .ogv and .webm are not supported in IE or Safari.
-                    if (check_browser_version('MSIE') || check_browser_version('Safari')) {
+                    if (core_useragent::check_ie_version() || core_useragent::check_safari_version()) {
                         continue;
                     }
                 } else {
                     // Formats .m4v and .mp4 are not supported in Firefox or Opera.
-                    if (check_browser_version('Firefox') || check_browser_version('Opera')) {
+                    if (core_useragent::check_firefox_version() || core_useragent::check_opera_version()) {
                         continue;
                     }
                 }
@@ -1136,18 +1136,18 @@ OET;
             if (in_array($ext, $extensions)) {
                 if ($ext === 'ogg' || $ext === 'oga') {
                     // Formats .ogg and .oga are not supported in IE or Safari.
-                    if (check_browser_version('MSIE') || check_browser_version('Safari')) {
+                    if (core_useragent::check_ie_version() || core_useragent::check_safari_version()) {
                         continue;
                     }
                 } else {
                     // Formats .aac, .mp3, and .m4a are not supported in Firefox or Opera.
-                    if (check_browser_version('Firefox') || check_browser_version('Opera')) {
+                    if (core_useragent::check_firefox_version() || core_useragent::check_opera_version()) {
                         continue;
                     }
                 }
                 // Old Android versions (pre 2.3.3) 'support' audio tag but no codecs.
-                if (check_browser_version('WebKit Android') &&
-                        !check_browser_version('WebKit Android', '533.1')) {
+                if (core_useragent::check_webkit_android_version() &&
+                        !core_useragent::check_webkit_android_version('533.1')) {
                     continue;
                 }
 

lib/moodlelib.php

@@ -7403,448 +7403,6 @@ function check_php_version($version='5.2.4') {
     return (version_compare(phpversion(), $version) >= 0);
 }
 
-/**
- * Checks to see if is the browser operating system matches the specified brand.
- *
- * Known brand: 'Windows','Linux','Macintosh','SGI','SunOS','HP-UX'
- *
- * @uses $_SERVER
- * @param string $brand The operating system identifier being tested
- * @return bool true if the given brand below to the detected operating system
- */
-function check_browser_operating_system($brand) {
-    if (empty($_SERVER['HTTP_USER_AGENT'])) {
-        return false;
-    }
-
-    if (preg_match("/$brand/i", $_SERVER['HTTP_USER_AGENT'])) {
-        return true;
-    }
-
-    return false;
-}
-
-/**
- * Checks to see if is a browser matches the specified
- * brand and is equal or better version.
- *
- * @uses $_SERVER
- * @param string $brand The browser identifier being tested
- * @param int $version The version of the browser, if not specified any version (except 5.5 for IE for BC reasons)
- * @return bool true if the given version is below that of the detected browser
- */
-function check_browser_version($brand, $version = null) {
-    if (empty($_SERVER['HTTP_USER_AGENT'])) {
-        return false;
-    }
-
-    $agent = $_SERVER['HTTP_USER_AGENT'];
-
-    switch ($brand) {
-
-        case 'Camino':
-            // OSX browser using Gecke engine.
-            if (strpos($agent, 'Camino') === false) {
-                return false;
-            }
-            if (empty($version)) {
-                return true; // No version specified.
-            }
-            if (preg_match("/Camino\/([0-9\.]+)/i", $agent, $match)) {
-                if (version_compare($match[1], $version) >= 0) {
-                    return true;
-                }
-            }
-            break;
-
-        case 'Firefox':
-            // Mozilla Firefox browsers.
-            if (strpos($agent, 'Iceweasel') === false and strpos($agent, 'Firefox') === false) {
-                return false;
-            }
-            if (empty($version)) {
-                return true; // No version specified..
-            }
-            if (preg_match("/(Iceweasel|Firefox)\/([0-9\.]+)/i", $agent, $match)) {
-                if (version_compare($match[2], $version) >= 0) {
-                    return true;
-                }
-            }
-            break;
-
-        case 'Gecko':
-            // Gecko based browsers.
-            // Do not look for dates any more, we expect real Firefox version here.
-            if (empty($version)) {
-                $version = 1;
-            } else if ($version > 20000000) {
-                // This is just a guess, it is not supposed to be 100% accurate!
-                if (preg_match('/^201/', $version)) {
-                    $version = 3.6;
-                } else if (preg_match('/^200[7-9]/', $version)) {
-                    $version = 3;
-                } else if (preg_match('/^2006/', $version)) {
-                    $version = 2;
-                } else {
-                    $version = 1.5;
-                }
-            }
-            if (preg_match("/(Iceweasel|Firefox)\/([0-9\.]+)/i", $agent, $match)) {
-                // Use real Firefox version if specified in user agent string.
-                if (version_compare($match[2], $version) >= 0) {
-                    return true;
-                }
-            } else if (preg_match("/Gecko\/([0-9\.]+)/i", $agent, $match)) {
-                // Gecko might contain date or Firefox revision, let's just guess the Firefox version from the date.
-                $browserver = $match[1];
-                if ($browserver > 20000000) {
-                    // This is just a guess, it is not supposed to be 100% accurate!
-                    if (preg_match('/^201/', $browserver)) {
-                        $browserver = 3.6;
-                    } else if (preg_match('/^200[7-9]/', $browserver)) {
-                        $browserver = 3;
-                    } else if (preg_match('/^2006/', $version)) {
-                        $browserver = 2;
-                    } else {