PHP JUri::toString方法代码示例

 public function getBattleNetUrl()
 {
     $uri = new JUri();
     $uri->setScheme($this->params->get('scheme', 'http'));
     $uri->setHost($this->params->get('region') . '.battle.net');
     $uri->setPath('/wow/' . $this->params->get('locale') . '/guild/' . rawurlencode($this->params->get('realm')) . '/' . rawurlencode($this->params->get('guild')) . '/');
     return $uri->toString();
 }

 /**
  * @param JUri $uri
  *
  * @throws RuntimeException
  *
  * @return mixed
  */
 protected function getRemote($uri, $persistent = false)
 {
     $uri->setScheme('https');
     $uri->setHost('www.warcraftlogs.com');
     $this->url = $uri->toString();
     $result = parent::getRemote($this->url, $persistent);
     $result->body = json_decode($result->body);
     if ($result->code != 200) {
         // hide api key from normal users
         if (!JFactory::getUser()->get('isRoot')) {
             $uri->delVar('api_key');
             $this->url = $uri->toString();
         }
         $msg = JText::sprintf('Server Error: %s url: %s', $result->body->error, JHtml::_('link', $this->url, $result->code, array('target' => '_blank')));
         // TODO JText::_()
         throw new RuntimeException($msg);
     }
     return $result;
 }

 /**
  * Test the toString method.
  *
  * @return  void
  *
  * @since   11.1
  * @covers  JUri::toString
  */
 public function testToString()
 {
     $this->object->parse('http://someuser:somepass@www.example.com:80/path/file.html?var=value#fragment');
     $this->assertThat($this->object->toString(), $this->equalTo('http://someuser:somepass@www.example.com:80/path/file.html?var=value#fragment'));
     $this->object->setQuery('somevar=somevalue');
     $this->object->setVar('somevar2', 'somevalue2');
     $this->object->setScheme('ftp');
     $this->object->setUser('root');
     $this->object->setPass('secret');
     $this->object->setHost('www.example.org');
     $this->object->setPort('8888');
     $this->object->setFragment('someFragment');
     $this->object->setPath('/this/is/a/path/to/a/file');
     $this->assertThat($this->object->toString(), $this->equalTo('ftp://root:secret@www.example.org:8888/this/is/a/path/to/a/file?somevar=somevalue&somevar2=somevalue2#someFragment'));
 }

 /**
  * A method to do Google translate.
  *
  * @param   string $text      String to translate.
  * @param   string $SourceLan Translate from this language, eg: 'zh-tw'. Empty will auto detect.
  * @param   string $ResultLan Translate to this language, eg: 'en'. Empty will auto detect.
  *
  * @return  string|bool Translated text.
  */
 public static function gTranslate($text, $SourceLan, $ResultLan)
 {
     $url = new \JUri();
     // For Google APIv2
     $url->setHost('https://www.googleapis.com/');
     $url->setPath('language/translate/v2');
     $query['key'] = self::APT_KEY;
     $query['q'] = urlencode($text);
     $query['source'] = $SourceLan;
     $query['target'] = $ResultLan;
     if (!$text) {
         return false;
     }
     $url->setQuery($query);
     $url->toString();
     $response = CurlHelper::get((string) $url);
     if (empty($response->body)) {
         return '';
     }
     $json = new \JRegistry();
     $json->loadString($response->body, 'json');
     $r = $json->get('data.translations');
     return $r[0]->translatedText;
 }

 /**
  * Send a command to the server and validate an expected response.
  *
  * @param   string  Command to send to the server.
  * @param   mixed   Valid response code or array of response codes.
  *
  * @return  boolean  True on success.
  *
  * @since   11.1
  * @throws  JException
  */
 protected function _sendRequest($connection, $method, JUri $uri, $data = null, $headers = null)
 {
     // Make sure the connection is a valid resource.
     if (is_resource($connection)) {
         // Make sure the connection has not timed out.
         $meta = stream_get_meta_data($connection);
         if ($meta['timed_out']) {
             throw new JException('Server connection timed out.', 0, E_WARNING);
         }
     } else {
         throw new JException('Not connected to server.', 0, E_WARNING);
     }
     // Get the request path from the URI object.
     $path = $uri->toString(array('path', 'query'));
     // Build the request payload.
     $request = array();
     $request[] = strtoupper($method) . ' ' . (empty($path) ? '/' : $path) . ' HTTP/1.0';
     $request[] = 'Host: ' . $uri->getHost();
     $request[] = 'User-Agent: JHttp | Joomla/2.0';
     // If there are custom headers to send add them to the request payload.
     if (is_array($headers)) {
         foreach ($headers as $k => $v) {
             $request[] = $k . ': ' . $v;
         }
     }
     // If we have data to send add it to the request payload.
     if (!empty($data)) {
         // If the data is an array, build the request query string.
         if (is_array($data)) {
             $data = http_build_query($data);
         }
         $request[] = 'Content-Type: application/x-www-form-urlencoded; charset=utf-8';
         $request[] = 'Content-Length: ' . strlen($data);
         $request[] = null;
         $request[] = $data;
     }
     // Send the request to the server.
     fwrite($connection, implode("\r\n", $request) . "\r\n\r\n");
     // Get the response data from the server.
     $this->_response = null;
     while (!feof($connection)) {
         $this->_response .= fgets($connection, 4096);
     }
     return true;
 }

	/**
	 * Get the referrer page.
	 *
	 * If there's no referrer or it's external, Kunena will return default page.
	 * Also referrers back to tasks are removed.
	 *
	 * @param string $default  Default page to return into.
	 * @param string $anchor   Anchor (location in the page).
	 *
	 * @return string
	 */
	public static function getReferrer($default = null, $anchor = null)
	{
		$app = JFactory::getApplication();

		$referrer = $app->input->server->getString('HTTP_REFERER');

		if ($referrer)
		{
			$uri = new JUri($referrer);

			// Make sure we do not return into a task -- or if task is SEF encoded, make sure it fails.
			$uri->delVar('task');
			$uri->delVar(JSession::getFormToken());

			// Check that referrer was from the same domain and came from the Joomla frontend or backend.
			$base = $uri->toString(array('scheme', 'host', 'port', 'path'));
			$host = $uri->toString(array('scheme', 'host', 'port'));

			// Referrer should always have host set and it should come from the same base address.
			if (empty($host) || stripos($base, JUri::base()) !== 0)
			{
				$uri = null;
			}
		}

		if (!isset($uri))
		{
			if ($default == null)
			{
				$default = $app->isSite() ? 'index.php?option=com_kunena' : 'administrator/index.php?option=com_kunena';
			}

			$default = self::_($default);
			$uri = new JUri($default);
		}

		if ($anchor)
		{
			$uri->setFragment($anchor);
		}

		return $uri->toString(array('path', 'query', 'fragment'));
	}

 function onAfterInitialise()
 {
     /** @var JSite $app */
     $app = JFactory::getApplication();
     if ($app->isAdmin()) {
         // don't use MobileJoomla in backend
         return;
     }
     $is_joomla15 = $this->isJoomla15();
     //load MobileJoomla class
     require_once JPATH_ADMINISTRATOR . '/components/com_mobilejoomla/classes/mobilejoomla.php';
     //load config
     $MobileJoomla_Settings =& MobileJoomla::getConfig();
     $MobileJoomla_Device =& MobileJoomla::getDevice();
     // check for legacy redirect
     if (@$_GET['option'] == 'com_mobilejoomla' && @$_GET['task'] == 'setmarkup' && isset($_GET['markup']) && isset($_GET['return'])) {
         $desktop_uri = new JUri($MobileJoomla_Settings['desktop_url']);
         $uri = new JUri(base64_decode($_GET['return']));
         if (!$uri->getScheme()) {
             $uri->setScheme('http');
         }
         $uri->setHost($desktop_uri->getHost());
         $uri->setPort($desktop_uri->getPort());
         $app->redirect($uri->toString());
     }
     JPluginHelper::importPlugin('mobile');
     $cached_data = $app->getUserState('mobilejoomla.cache');
     if ($cached_data !== null) {
         $cached_data = @gzinflate(@base64_decode($cached_data));
         if ($cached_data !== false) {
             $cached_data = @unserialize($cached_data);
         }
     }
     if (is_array($cached_data)) {
         $MobileJoomla_Device = $cached_data['device'];
     } else {
         $app->triggerEvent('onDeviceDetection', array(&$MobileJoomla_Settings, &$MobileJoomla_Device));
         $gzlevel = 5;
         $cached_data = array('device' => $MobileJoomla_Device);
         $cached_data = base64_encode(gzdeflate(serialize($cached_data), $gzlevel));
         $app->setUserState('mobilejoomla.cache', $cached_data);
     }
     $MobileJoomla_Device['markup'] = self::CheckMarkup($MobileJoomla_Device['markup']);
     $MobileJoomla_Device['real_markup'] = $MobileJoomla_Device['markup'];
     $app->triggerEvent('onAfterDeviceDetection', array(&$MobileJoomla_Settings, &$MobileJoomla_Device));
     $MobileJoomla_Device['markup'] = self::CheckMarkup($MobileJoomla_Device['markup']);
     $markup = $MobileJoomla_Device['markup'];
     $MobileJoomla_Device['default_markup'] = $markup;
     //get user choice
     $user_markup = $this->getUserMarkup();
     if ($user_markup !== false) {
         $markup = $user_markup;
     }
     // template preview
     $getTemplate = isset($_GET['template']) ? $_GET['template'] : null;
     if (version_compare(JVERSION, '1.7', '>=')) {
         if ($getTemplate === null && isset($_GET['templateStyle']) && is_int($_GET['templateStyle'])) {
             $db = JFactory::getDBO();
             $query = 'SELECT template FROM #__template_styles WHERE id = ' . intval($_GET['templateStyle']) . ' AND client_id = 0';
             $db->setQuery($query);
             $getTemplate = $db->loadResult();
         }
     } elseif (version_compare(JVERSION, '1.6', '>=')) {
         if (is_int($getTemplate)) {
             $db = JFactory::getDBO();
             $query = 'SELECT template FROM #__template_styles WHERE id = ' . intval($getTemplate) . ' AND client_id = 0';
             $db->setQuery($query);
             $getTemplate = $db->loadResult();
         }
     }
     if ($getTemplate) {
         switch ($getTemplate) {
             case $MobileJoomla_Settings['xhtml.template']:
                 $markup = 'xhtml';
                 break;
             case $MobileJoomla_Settings['iphone.template']:
                 $markup = 'iphone';
                 break;
             case $MobileJoomla_Settings['wml.template']:
                 $markup = 'wml';
                 break;
             case $MobileJoomla_Settings['chtml.template']:
                 $markup = 'chtml';
                 break;
         }
     }
     $MobileJoomla_Device['markup'] = $markup;
     if ($MobileJoomla_Device['screenwidth'] == 0 || $MobileJoomla_Device['screenheight'] == 0) {
         switch ($markup) {
             case 'wml':
                 $MobileJoomla_Device['screenwidth'] = 64;
                 $MobileJoomla_Device['screenheight'] = 96;
                 break;
             case 'chtml':
                 $MobileJoomla_Device['screenwidth'] = 120;
                 $MobileJoomla_Device['screenheight'] = 128;
                 break;
             case 'xhtml':
                 $MobileJoomla_Device['screenwidth'] = 320;
                 $MobileJoomla_Device['screenheight'] = 480;
//.........这里部分代码省略.........

 /**
  * Substitutes the [RENEWALURL:couponcode] tag in messages
  *
  * @param string $text       The message text
  * @param string $renewalURL The base renewal URL (without a coupon code)
  *
  * @return string The text with the tag replaced with the proper URLs
  */
 public static function substituteRenewalURLWithCoupon($text, $renewalURL)
 {
     // Find where the tag starts
     $nextPos = 0;
     $tagStartText = '[RENEWALURL:';
     if (!class_exists('JUri', true)) {
         JLoader::import('joomla.environment.uri');
         JLoader::import('joomla.uri.uri');
     }
     $uri = new JUri($renewalURL);
     do {
         $pos = strpos($text, $tagStartText, $nextPos);
         if ($pos === false) {
             // Not found? No change.
             continue;
         }
         // Get the start position of the coupon name
         $couponStartPos = $pos + strlen($tagStartText);
         // Get the end position of the tag
         $endPos = strpos($text, ']', $couponStartPos);
         // If no end position is found, ignore the tag
         if ($endPos == $couponStartPos) {
             $nextPos = $couponStartPos + 1;
             continue;
         }
         // Get the coupon code
         $couponCode = substr($text, $couponStartPos, $endPos - $couponStartPos);
         // Create the URL
         $uri->setVar('coupon', $couponCode);
         $toReplace = substr($text, $pos, $endPos - $pos + 1);
         $text = str_replace($toReplace, $uri->toString(), $text);
     } while ($pos !== false);
     return $text;
 }

 public function step()
 {
     // Check permissions
     $this->_checkPermissions();
     // Set the profile
     $this->_setProfile();
     // Get the backup ID
     $backupId = $this->input->get('backupid', null, 'raw', 2);
     if (empty($backupId)) {
         $backupId = null;
     }
     $kettenrad = AECoreKettenrad::load(AKEEBA_BACKUP_ORIGIN, $backupId);
     $kettenrad->setBackupId($backupId);
     $kettenrad->tick();
     $array = $kettenrad->getStatusArray();
     $kettenrad->resetWarnings();
     // So as not to have duplicate warnings reports
     AECoreKettenrad::save(AKEEBA_BACKUP_ORIGIN, $backupId);
     if ($array['Error'] != '') {
         @ob_end_clean();
         echo '500 ERROR -- ' . $array['Error'];
         flush();
         JFactory::getApplication()->close();
     } elseif ($array['HasRun'] == 1) {
         // All done
         AEFactory::nuke();
         AEUtilTempvars::reset();
         @ob_end_clean();
         echo '200 OK';
         flush();
         JFactory::getApplication()->close();
     } else {
         $noredirect = $this->input->get('noredirect', 0, 'int');
         if ($noredirect != 0) {
             @ob_end_clean();
             echo "301 More work required";
             flush();
             JFactory::getApplication()->close();
         } else {
             $curUri = JUri::getInstance();
             $ssl = $curUri->isSSL() ? 1 : 0;
             $tempURL = JRoute::_('index.php?option=com_akeeba', false, $ssl);
             $uri = new JUri($tempURL);
             $uri->setVar('view', 'backup');
             $uri->setVar('task', 'step');
             $uri->setVar('key', $this->input->get('key', '', 'none', 2));
             $uri->setVar('profile', $this->input->get('profile', 1, 'int'));
             if (!empty($backupId)) {
                 $uri->setVar('backupid', $backupId);
             }
             // Maybe we have a multilingual site?
             $lg = F0FPlatform::getInstance()->getLanguage();
             $languageTag = $lg->getTag();
             $uri->setVar('lang', $languageTag);
             $redirectionUrl = $uri->toString();
             $this->_customRedirect($redirectionUrl);
         }
     }
 }

 /**
  * Renders a Form for an Edit view and returns the corresponding HTML
  *
  * @param   Form   &$form  The form to render
  * @param   DataModel  $model  The model providing our data
  *
  * @return  string    The HTML rendering of the form
  */
 public function renderFormEdit(Form &$form, DataModel $model)
 {
     // Get the key for this model's table
     $key = $model->getKeyName();
     $keyValue = $model->getId();
     $html = '';
     $validate = strtolower($form->getAttribute('validate'));
     if (in_array($validate, array('true', 'yes', '1', 'on'))) {
         \JHTML::_('behavior.formvalidation');
         $class = ' form-validate';
         $this->loadValidationScript($form);
     } else {
         $class = '';
     }
     // Check form enctype. Use enctype="multipart/form-data" to upload binary files in your form.
     $template_form_enctype = $form->getAttribute('enctype');
     if (!empty($template_form_enctype)) {
         $enctype = ' enctype="' . $form->getAttribute('enctype') . '" ';
     } else {
         $enctype = '';
     }
     // Check form name. Use name="yourformname" to modify the name of your form.
     $formname = $form->getAttribute('name');
     if (empty($formname)) {
         $formname = 'adminForm';
     }
     // Check form ID. Use id="yourformname" to modify the id of your form.
     $formid = $form->getAttribute('id');
     if (empty($formid)) {
         $formid = $formname;
     }
     // Check if we have a custom task
     $customTask = $form->getAttribute('customTask');
     if (empty($customTask)) {
         $customTask = '';
     }
     // Get the form action URL
     $platform = $this->container->platform;
     $actionUrl = $platform->isBackend() ? 'index.php' : \JUri::root() . 'index.php';
     $itemid = $this->container->input->getCmd('Itemid', 0);
     if ($platform->isFrontend() && $itemid != 0) {
         $uri = new \JUri($actionUrl);
         if ($itemid) {
             $uri->setVar('Itemid', $itemid);
         }
         $actionUrl = \JRoute::_($uri->toString());
     }
     $html .= '<form action="' . $actionUrl . '" method="post" name="' . $formname . '" id="' . $formid . '"' . $enctype . ' class="form-horizontal' . $class . '">' . "\n";
     $html .= "\t" . '<input type="hidden" name="option" value="' . $this->container->componentName . '" />' . "\n";
     $html .= "\t" . '<input type="hidden" name="view" value="' . $form->getView()->getName() . '" />' . "\n";
     $html .= "\t" . '<input type="hidden" name="task" value="' . $customTask . '" />' . "\n";
     $html .= "\t" . '<input type="hidden" name="' . $key . '" value="' . $keyValue . '" />' . "\n";
     $html .= "\t" . '<input type="hidden" name="' . \JFactory::getSession()->getFormToken() . '" value="1" />' . "\n";
     $html .= $this->renderFormRaw($form, $model, 'edit');
     $html .= '</form>';
     return $html;
 }

$db->setQuery($query);
$menus = $db->loadObjectList();
foreach ($menus as $menu) {
    if (!$menu->link) {
        continue;
    }
    if (in_array($menu->type, array('alias', 'url'))) {
        continue;
    }
    // Fix URI bugs
    $uri = new JUri($menu->link);
    $uri->setVar('Itemid', $menu->id);
    if ($app->get('sef')) {
        $uri->setVar('layout', null);
    }
    $link = JRoute::_($uri->toString());
    $host = str_replace('http://' . $_SERVER['HTTP_HOST'], '', JUri::root());
    $link = str_replace($host, '', $link);
    $link = UriHelper::pathAddHost($link);
    // Set xml data
    $sitemap->addItem($link, '0.8', 'weekly', $date);
    $linkCache[] = $link;
}
// Build category map
$query = $db->getQuery(true);
$query->select("*")->from("#__categories")->where("id != 1")->where("published = 1")->where("access = 1")->where("extension = 'com_content'");
if ($locale) {
    $query->where($query->format('language IN (%q, %q)', $locale, '*'));
}
$db->setQuery($query);
$cats = $db->loadObjectList();

 /**
  * getHost.
  *
  * @return	string
  */
 public static function getHost()
 {
     $baseurl = JUri::root();
     $uri = new JUri();
     if ($uri->parse($baseurl)) {
         $host = $uri->toString(array('scheme', 'host', 'port'));
         return $host;
     }
     return null;
 }

 /**
  * Give a relative path, return path with host.
  *
  * @param   string $path A system path.
  *
  * @return  string  Path with host added.
  */
 public static function pathAddHost($path)
 {
     if (!$path) {
         return '';
     }
     // Build path
     $uri = new \JUri($path);
     if ($uri->getHost()) {
         return $path;
     }
     $uri->parse(\JUri::root());
     $root_path = $uri->getPath();
     if (strpos($path, $root_path) === 0) {
         $num = Utf8String::strlen($root_path);
         $path = Utf8String::substr($path, $num);
     }
     $uri->setPath($uri->getPath() . $path);
     $uri->setScheme('http');
     $uri->setQuery(null);
     return $uri->toString();
 }

    protected function getInput()
    {
        JHtml::_('jquery.framework');
        JHtml::_('script', 'system/html5fallback.js', false, true);
        $path = JUri::root() . 'plugins/system/ef4_jmframework/includes/assets/admin/formfields/jmplupload';
        $document = JFactory::getDocument();
        $document->addScript($path . '/js/plupload.full.min.js');
        $browse_button = !empty($this->element['browse_button']) ? JText::_($this->element['browse_button']) : JText::_('PLG_SYSTEM_JMFRAMEWORK_PLUPLOAD_BROWSE');
        $upload_button = !empty($this->element['upload_button']) ? JText::_($this->element['upload_button']) : JText::_('PLG_SYSTEM_JMFRAMEWORK_PLUPLOAD_UPLOAD');
        $browse_button_id = $this->id . '_browse';
        $upload_button_id = $this->id . '_upload';
        $container_id = $this->id . '_container';
        $filelist_id = $this->id . '_files';
        $console_id = $this->id . '_console';
        $flash_url = $path . '/js/Moxie.swf';
        $silverlight_url = $path . '/js/Moxie.xap';
        $extensions = !empty($this->element['extensions']) ? $this->element['extensions'] : 'json,svg,eot,woff,ttf,otf,zip,jpg,jpeg,png,css';
        $uri = JUri::getInstance();
        $myuri = new JUri($uri->toString());
        $myuri->setVar('jmajax', 'plupload');
        $myuri->setVar('jmtask', (string) $this->element['task']);
        $myuri->setVar('jmpluploadid', $this->id);
        $url = $myuri->toString();
        //JURI::reset();
        $js = '
    			jQuery(document).ready(function(){
    				var JMPLUpload_' . $this->id . ' = new plupload.Uploader({
						runtimes : \'html5,flash,silverlight,html4\',
						browse_button : \'' . $browse_button_id . '\', 
						container: \'' . $container_id . '\',
						url : \'' . $url . '\',
						flash_swf_url : \'' . $flash_url . '\',
						silverlight_xap_url : \'' . $silverlight_url . '\',
						
						filters : {
							max_file_size : \'10mb\',
							mime_types: [
								{title : "Allowed files", extensions : "' . $extensions . '"}
							]
						},
					
						init: {
							PostInit: function() {
								document.getElementById(\'' . $filelist_id . '\').innerHTML = \'\';
					
								document.getElementById(\'' . $upload_button_id . '\').onclick = function() {
									JMPLUpload_' . $this->id . '.start();
									return false;
								};
							},
					
							FilesAdded: function(up, files) {
								plupload.each(files, function(file) {
									document.getElementById(\'' . $filelist_id . '\').innerHTML += \'<div id="\' + file.id + \'">\' + file.name + \' (\' + plupload.formatSize(file.size) + \') <b></b></div>\';
								});
							},
					
							UploadProgress: function(up, file) {
								document.getElementById(file.id).getElementsByTagName(\'b\')[0].innerHTML = \'<span>\' + file.percent + "%</span>";
							},
							
							Error: function(up, err) {
								document.getElementById(\'' . $console_id . '\').innerHTML += "\\nError #" + err.code + ": " + err.message;
							},
										
							UploadComplete: function(up, file, undef) {
								jQuery(document).trigger("jmplupload_' . $this->id . '", [up, file, undef]);
							}
						}
					});
					
					JMPLUpload_' . $this->id . '.init();
    			});
    			';
        $document->addScriptDeclaration($js);
        $html = '
    			<div id="' . $container_id . '">
	    			<span id="' . $browse_button_id . '" class="button btn">' . $browse_button . '</span>
					<span id="' . $upload_button_id . '" class="button btn">' . $upload_button . '</span>
				</div>
				<div>
					<p id="' . $console_id . '"></p>
					<p id="' . $filelist_id . '">Your browser doesn\'t have Flash, Silverlight or HTML5 support.</p>
				</div>
    	';
        return $html;
    }

 /**
  * The update check and notification email code is triggered after the page has fully rendered.
  *
  * @return  void
  *
  * @since   3.5
  */
 public function onAfterRender()
 {
     // Get the timeout for Joomla! updates, as configured in com_installer's component parameters
     JLoader::import('joomla.application.component.helper');
     $component = JComponentHelper::getComponent('com_installer');
     /** @var \Joomla\Registry\Registry $params */
     $params = $component->params;
     $cache_timeout = (int) $params->get('cachetimeout', 6);
     $cache_timeout = 3600 * $cache_timeout;
     // Do we need to run? Compare the last run timestamp stored in the plugin's options with the current
     // timestamp. If the difference is greater than the cache timeout we shall not execute again.
     $now = time();
     $last = (int) $this->params->get('lastrun', 0);
     if (!defined('PLG_SYSTEM_UPDATENOTIFICATION_DEBUG') && abs($now - $last) < $cache_timeout) {
         return;
     }
     // Update last run status
     // If I have the time of the last run, I can update, otherwise insert
     $this->params->set('lastrun', $now);
     $db = JFactory::getDbo();
     $query = $db->getQuery(true)->update($db->qn('#__extensions'))->set($db->qn('params') . ' = ' . $db->q($this->params->toString('JSON')))->where($db->qn('type') . ' = ' . $db->q('plugin'))->where($db->qn('folder') . ' = ' . $db->q('system'))->where($db->qn('element') . ' = ' . $db->q('updatenotification'));
     try {
         // Lock the tables to prevent multiple plugin executions causing a race condition
         $db->lockTable('#__extensions');
     } catch (Exception $e) {
         // If we can't lock the tables it's too risky to continue execution
         return;
     }
     try {
         // Update the plugin parameters
         $result = $db->setQuery($query)->execute();
         $this->clearCacheGroups(array('com_plugins'), array(0, 1));
     } catch (Exception $exc) {
         // If we failed to execite
         $db->unlockTables();
         $result = false;
     }
     try {
         // Unlock the tables after writing
         $db->unlockTables();
     } catch (Exception $e) {
         // If we can't lock the tables assume we have somehow failed
         $result = false;
     }
     // Abort on failure
     if (!$result) {
         return;
     }
     // This is the extension ID for Joomla! itself
     $eid = 700;
     // Get any available updates
     $updater = JUpdater::getInstance();
     $results = $updater->findUpdates(array($eid), $cache_timeout);
     // If there are no updates our job is done. We need BOTH this check AND the one below.
     if (!$results) {
         return;
     }
     // Unfortunately Joomla! MVC doesn't allow us to autoload classes
     JModelLegacy::addIncludePath(JPATH_ADMINISTRATOR . '/components/com_installer/models', 'InstallerModel');
     // Get the update model and retrieve the Joomla! core updates
     $model = JModelLegacy::getInstance('Update', 'InstallerModel');
     $model->setState('filter.extension_id', $eid);
     $updates = $model->getItems();
     // If there are no updates we don't have to notify anyone about anything. This is NOT a duplicate check.
     if (empty($updates)) {
         return;
     }
     // Get the available update
     $update = array_pop($updates);
     // Check the available version. If it's the same as the installed version we have no updates to notify about.
     if (version_compare($update->version, JVERSION, 'eq')) {
         return;
     }
     // If we're here, we have updates. First, get a link to the Joomla! Update component.
     $baseURL = JUri::base();
     $baseURL = rtrim($baseURL, '/');
     $baseURL .= substr($baseURL, -13) != 'administrator' ? '/administrator/' : '/';
     $baseURL .= 'index.php?option=com_joomlaupdate';
     $uri = new JUri($baseURL);
     /**
      * Some third party security solutions require a secret query parameter to allow log in to the administrator
      * backend of the site. The link generated above will be invalid and could probably block the user out of their
      * site, confusing them (they can't understand the third party security solution is not part of Joomla! proper).
      * So, we're calling the onBuildAdministratorLoginURL system plugin event to let these third party solutions
      * add any necessary secret query parameters to the URL. The plugins are supposed to have a method with the
      * signature:
      *
      * public function onBuildAdministratorLoginURL(JUri &$uri);
      *
      * The plugins should modify the $uri object directly and return null.
      */
     JEventDispatcher::getInstance()->trigger('onBuildAdministratorLoginURL', array(&$uri));
     // Let's find out the email addresses to notify
//.........这里部分代码省略.........