PHP Cache::hash方法代码示例

//.........这里部分代码省略.........
             }
             $flashvars .= 'width=' . $width . '&height=' . $height;
             // if there is a static image for this video, use it
             if (isset($item['icon_url']) && $item['icon_url']) {
                 $flashvars .= '&startimage=' . urlencode($item['icon_url']);
             }
             // if there is a subtitle file for this video, use it
             if (isset($item['file_name']) && ($srt = 'files/' . str_replace(':', '/', $item['anchor']) . '/' . str_replace('.' . $extension, '.srt', $item['file_name'])) && file_exists($context['path_to_root'] . $srt)) {
                 $flashvars .= '&srt=1&srturl=' . urlencode($context['url_to_home'] . $context['url_to_root'] . $srt);
             }
             // if there is a logo file in the skin, use it
             Skin::define_img_href('FLV_IMG_HREF', 'codes/flvplayer_logo.png', '');
             if (FLV_IMG_HREF) {
                 $flashvars .= '&top1=' . urlencode(FLV_IMG_HREF . '|10|10');
             }
             // rely on Flash
             if (Surfer::has_flash()) {
                 // the full object is built in Javascript --see parameters at http://flv-player.net/players/maxi/documentation/
                 $output = '<div id="flv_' . $item['id'] . '" class="no_print">Flash plugin or Javascript are turned off. Activate both and reload to view the object</div>' . "\n";
                 Page::insert_script('var flashvars = { flv:"' . $url . '", ' . str_replace(array('&', '='), array('", ', ':"'), $flashvars) . '", autoload:0, margin:1, showiconplay:1, playeralpha:50, iconplaybgalpha:30, showfullscreen:1, showloading:"always", ondoubleclick:"fullscreen" }' . "\n" . 'var params = { allowfullscreen: "true", allowscriptaccess: "always" }' . "\n" . 'var attributes = { id: "file_' . $item['id'] . '", name: "file_' . $item['id'] . '"}' . "\n" . 'swfobject.embedSWF("' . $flvplayer_url . '", "flv_' . $item['id'] . '", "' . $width . '", "' . $height . '", "9", "' . $context['url_to_home'] . $context['url_to_root'] . 'included/browser/expressinstall.swf", flashvars, params);' . "\n");
                 // native support
             } else {
                 // <video> is HTML5, <object> is legacy
                 $output = '<video width="' . $width . '" height="' . $height . '" autoplay="" controls="" src="' . $url . '" >' . "\n" . '	<object width="' . $width . '" height="' . $height . '" data="' . $url . '" type="' . Files::get_mime_type($item['file_name']) . '">' . "\n" . '		<param value="' . $url . '" name="movie" />' . "\n" . '		<param value="true" name="allowFullScreen" />' . "\n" . '		<param value="always" name="allowscriptaccess" />' . "\n" . '		<a href="' . $url . '">No video playback capabilities, please download the file</a>' . "\n" . '	</object>' . "\n" . '</video>' . "\n";
             }
             // job done
             return $output;
             // a ganttproject timeline
         // a ganttproject timeline
         case 'gan':
             // where the file is
             $path = Files::get_path($item['anchor']) . '/' . rawurlencode($item['file_name']);
             // we actually use a transformed version of the file
             $cache_id = Cache::hash($path) . '.xml';
             // apply the transformation
             if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) < filemtime($context['path_to_root'] . $path) || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
                 // transform from GanttProject to SIMILE Timeline
                 $text = Files::transform_gan_to_simile($path);
                 // put in cache
                 Safe::file_put_contents($cache_id, $text);
             }
             // load the SIMILE Timeline javascript library in shared/global.php
             $context['javascript']['timeline'] = TRUE;
             // cache would kill the loading of the library
             cache::poison();
             // 1 week ago
             $now = gmdate('M d Y H:i:s', time() - 7 * 24 * 60 * 60);
             // load the right file
             $output = '<div id="gantt" style="height: ' . $height . '; width: ' . $width . '; border: 1px solid #aaa; font-family: Trebuchet MS, Helvetica, Arial, sans serif; font-size: 8pt"></div>' . "\n";
             Page::insert_script('var simile_handle;' . "\n" . 'function onLoad() {' . "\n" . '  var eventSource = new Timeline.DefaultEventSource();' . "\n" . '	var theme = Timeline.ClassicTheme.create();' . "\n" . '            theme.event.bubble.width = 350;' . "\n" . '            theme.event.bubble.height = 300;' . "\n" . '  var bandInfos = [' . "\n" . '    Timeline.createBandInfo({' . "\n" . '        eventSource:    eventSource,' . "\n" . '        date:           "' . $now . '",' . "\n" . '        width:          "80%",' . "\n" . '        intervalUnit:   Timeline.DateTime.WEEK,' . "\n" . '        intervalPixels: 200,' . "\n" . '		  theme:          theme,' . "\n" . '        layout:         "original"  // original, overview, detailed' . "\n" . '    }),' . "\n" . '    Timeline.createBandInfo({' . "\n" . '        showEventText: false,' . "\n" . '        trackHeight: 0.5,' . "\n" . '        trackGap: 0.2,' . "\n" . '        eventSource:    eventSource,' . "\n" . '        date:           "' . $now . '",' . "\n" . '        width:          "20%",' . "\n" . '        intervalUnit:   Timeline.DateTime.MONTH,' . "\n" . '        intervalPixels: 50' . "\n" . '    })' . "\n" . '  ];' . "\n" . '  bandInfos[1].syncWith = 0;' . "\n" . '  bandInfos[1].highlight = true;' . "\n" . '  bandInfos[1].eventPainter.setLayout(bandInfos[0].eventPainter.getLayout());' . "\n" . '  simile_handle = Timeline.create(document.getElementById("gantt"), bandInfos, Timeline.HORIZONTAL);' . "\n" . '	simile_handle.showLoadingMessage();' . "\n" . '  Timeline.loadXML("' . $context['url_to_home'] . $context['url_to_root'] . $cache_id . '", function(xml, url) { eventSource.loadXML(xml, url); });' . "\n" . '	simile_handle.hideLoadingMessage();' . "\n" . '}' . "\n" . "\n" . 'var resizeTimerID = null;' . "\n" . 'function onResize() {' . "\n" . '    if (resizeTimerID == null) {' . "\n" . '        resizeTimerID = window.setTimeout(function() {' . "\n" . '            resizeTimerID = null;' . "\n" . '            simile_handle.layout();' . "\n" . '        }, 500);' . "\n" . '    }' . "\n" . '}' . "\n" . "\n" . '// observe page major events' . "\n" . '$(document).ready( onLoad);' . "\n" . '$(window).resize(onResize);' . "\n");
             // job done
             return $output;
             // a Freemind map
         // a Freemind map
         case 'mm':
             // if we have an external reference, use it
             if (isset($item['file_href']) && $item['file_href']) {
                 $target_href = $item['file_href'];
                 // else redirect to ourself
             } else {
                 // ensure a valid file name
                 $file_name = utf8::to_ascii($item['file_name']);
                 // where the file is
                 $path = Files::get_path($item['anchor']) . '/' . rawurlencode($item['file_name']);
                 // map the file on the regular web space
                 $url_prefix = $context['url_to_home'] . $context['url_to_root'];

if (!$permitted) {
    // give anonymous surfers a chance for HTTP authentication
    if (!Surfer::is_logged()) {
        Safe::header('WWW-Authenticate: Basic realm="' . utf8::to_iso8859($context['site_name']) . '"');
        Safe::header('Status: 401 Unauthorized', TRUE, 401);
    }
    // permission denied to authenticated user
    Safe::header('Status: 401 Unauthorized', TRUE, 401);
    Logger::error(i18n::s('You are not allowed to perform this operation.'));
    // display feed content
} else {
    // get the list from the cache, if possible
    if (is_object($anchor)) {
        $cache_id = Cache::hash('comments/feed/' . $anchor->get_reference) . '.xml';
    } else {
        $cache_id = Cache::hash('comments/feed') . '.xml';
    }
    // save for 5 minutes
    if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
        $text = '';
        // loads feeding parameters
        Safe::load('parameters/feeds.include.php');
        // set channel information
        $values = array();
        $values['channel'] = array();
        if (is_object($anchor)) {
            $values['channel']['title'] = sprintf(i18n::s('Comments for: %s'), $anchor->get_title());
            $values['channel']['link'] = $context['url_to_home'] . $context['url_to_root'] . $anchor->get_url();
            $values['channel']['description'] = $anchor->get_teaser('quote');
        } else {
            $values['channel']['title'] = sprintf(i18n::s('Recent comments at %s'), $context['site_name']);

 /**
  * list articles
  *
  * @param resource the SQL result
  * @return string the rendered text
  *
  * @see layouts/layout.php
  **/
 function layout($result)
 {
     global $context;
     // we return some text
     $text = '';
     // empty list
     if (!SQL::count($result)) {
         return $text;
     }
     // sanity check
     if (!isset($this->focus)) {
         $this->focus = 'map';
     }
     // put in cache
     $cache_id = Cache::hash('articles/layout_articles_as_carrousel:' . $this->focus) . '.xml';
     // save for one minute
     if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 60 < time()) {
         // content of the slideshow
         $content = '<?xml version="1.0" encoding="utf-8"?><!-- fhShow Carousel 2.0 configuration file Please visit http://www.flshow.net/ -->' . "\n" . '<slide_show>' . "\n" . '	<options>' . "\n" . '		<debug>false</debug>				  <!-- true, false -->' . "\n" . '		<background>transparent</background>	  <!-- #RRGGBB, transparent -->' . "\n" . '		<friction>5</friction>			  <!-- [1,100] -->' . "\n" . '		<fullscreen>false</fullscreen>	  <!-- true, false -->' . "\n" . '		<margins>' . "\n" . '			<top>0</top>								  <!-- [-1000,1000] pixels -->' . "\n" . '			<left>0</left>							  <!-- [-1000,1000] pixels -->' . "\n" . '			<bottom>0</bottom>						  <!-- [-1000,1000] pixels -->' . "\n" . '			<right>0</right>							  <!-- [-1000,1000] pixels -->' . "\n" . '			<horizontal_ratio>20%</horizontal_ratio>	  <!-- [1,50] a photo may occupy at most horizontalRatio percent of the Carousel width -->' . "\n" . '			<vertical_ratio>90%</vertical_ratio>		  <!-- [1,100] a photo may occupy at most verticalRatio percent of the Carousel height -->' . "\n" . '		</margins>' . "\n" . '		<interaction>' . "\n" . '			<rotation>mouse</rotation>			<!-- auto, mouse, keyboard -->' . "\n" . '			<view_point>none</view_point>		   <!-- none, mouse, keyboard -->' . "\n" . '			<speed>15</speed>						<!-- [-360,360] degrees per second -->' . "\n" . '			<default_speed>15</default_speed>				<!-- [-360,360] degrees per second -->' . "\n" . '			<default_view_point>20%</default_view_point>	<!-- [0,100] percentage -->' . "\n" . '			<reset_delay>20</reset_delay>					<!-- [0,600] seconds, 0 means never reset -->' . "\n" . '		</interaction>' . "\n" . '		<far_photos>' . "\n" . '			<size>50%</size>					<!-- [0,100] percentage -->' . "\n" . '			<amount>50%</amount>				<!-- [0,100] percentage -->' . "\n" . '			<blur>10</blur>					<!-- [0,100] amount -->' . "\n" . '			<blur_quality>3</blur_quality>	<!-- [1,3] 1=low - 3=high -->' . "\n" . '		</far_photos>' . "\n" . '		<reflection>' . "\n" . '			<amount>25</amount>	   <!-- [0,1000] pixels -->' . "\n" . '			<blur>2</blur>			<!-- [0,100] blur amount -->' . "\n" . '			<distance>0</distance>	<!-- [-1000,1000] pixels -->' . "\n" . '			<alpha>40%</alpha>		<!-- [0,100] percentage -->' . "\n" . '		</reflection>' . "\n" . '		<titles>' . "\n" . '			<style>font-size: 14px; font-family: Verdana, _serif; color: #000000;</style>' . "\n" . '			<position>above center</position>			  <!-- [above, below] [left,center,right]-->' . "\n" . '			<background>' . $context['url_to_home'] . $context['url_to_root'] . 'skins/_reference/layouts/carrousel_bubble.png</background>	   <!-- image url -->' . "\n" . '			<scale9>35 35 35 35</scale9>				 <!-- [0,1000] pixels -->' . "\n" . '			<padding>8 15 10 15</padding>					<!-- [-1000,1000] pixels -->' . "\n" . '		</titles>' . "\n" . '	</options>' . "\n";
         // get a default image
         if (Safe::GetImageSize($context['path_to_root'] . $context['skin'] . '/layouts/map.gif')) {
             $default_href = $context['url_to_root'] . $context['skin'] . '/layouts/map.gif';
         } elseif ($size = Safe::GetImageSize($context['path_to_root'] . 'skins/_reference/layouts/map.gif')) {
             $default_href = $context['url_to_root'] . 'skins/_reference/layouts/map.gif';
         } else {
             $default_href = NULL;
         }
         // process all items in the list
         while ($item = SQL::fetch($result)) {
             // get the related overlay
             $overlay = Overlay::load($item, 'article:' . $item['id']);
             // get the anchor
             $anchor = Anchors::get($item['anchor']);
             // this is visual
             if (isset($item['icon_url']) && $item['icon_url']) {
                 $image = $item['icon_url'];
             } elseif (isset($item['thumbnail_url']) && $item['thumbnail_url']) {
                 $image = $item['thumbnail_url'];
             } elseif (is_callable(array($anchor, 'get_bullet_url')) && ($image = $anchor->get_bullet_url())) {
             } elseif ($default_href) {
                 $image = $default_href;
             } else {
                 continue;
             }
             // fix relative path
             if (!preg_match('/^(\\/|http:|https:|ftp:)/', $image)) {
                 $image = $context['url_to_home'] . $context['url_to_root'] . $image;
             }
             // build a title
             if (is_object($overlay)) {
                 $title = Codes::beautify_title($overlay->get_text('title', $item));
             } else {
                 $title = Codes::beautify_title($item['title']);
             }
             // the url to view this item
             $url = Articles::get_permalink($item);
             // add to the list
             $content .= '	<photo>' . "\n" . '		<title>' . $title . '</title>' . "\n" . '		<src>' . $image . '</src>' . "\n" . '		<href>' . $url . '</href>' . "\n" . '		<target>_self</target>' . "\n" . '	</photo>' . "\n";
         }
         // finalize slideshow content
         $content .= '</slide_show>';
         // put in cache
         Safe::file_put_contents($cache_id, $content);
     }
     // allow multiple instances
     static $count;
     if (!isset($count)) {
         $count = 1;
     } else {
         $count++;
     }
     // load the right file
     $text = '<div id="articles_as_carrousel_' . $count . '"></div>' . "\n";
     Page::insert_script('swfobject.embedSWF("' . $context['url_to_home'] . $context['url_to_root'] . 'included/browser/carrousel.swf",' . "\n" . '"articles_as_carrousel_' . $count . '",' . "\n" . '"100%",' . "\n" . '"150",' . "\n" . '"9.0.0",' . "\n" . 'false,' . "\n" . '{xmlfile:"' . $context['url_to_home'] . $context['url_to_root'] . $cache_id . '", loaderColor:"0x666666"},' . "\n" . '{wmode: "transparent"},' . "\n" . '{});' . "\n");
     // end of processing
     SQL::free($result);
     return $text;
 }

 * @link https://www.google.com/webmasters/sitemaps/docs/en/protocol.html Sitemap Protocol Contents
 *
 * @author Bernard Paques
 * @reference
 * @license http://www.gnu.org/copyleft/lesser.txt GNU Lesser General Public License
 */
// common definitions and initial processing
include_once 'shared/global.php';
// required by Google
$context['charset'] = 'utf-8';
// load localized strings
i18n::bind('root');
// load a skin engine
load_skin('sitemap');
// get the list from the cache, if possible
$cache_id = Cache::hash('sitemap') . '.xml';
// save for 5 minutes
if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
    $text = '';
    // the preamble
    $text = '<?xml version="1.0" encoding="' . $context['charset'] . '"?>' . "\n" . '<urlset xmlns="http://www.google.com/schemas/sitemap/0.84">' . "\n";
    // the front page
    $text .= '	<url>' . "\n" . '		<loc>' . $context['url_to_home'] . $context['url_to_root'] . '</loc>' . "\n" . '		<changefreq>weekly</changefreq>' . "\n" . '		<priority>1.0</priority>' . "\n" . '	</url>' . "\n\n";
    // the site map
    $text .= '	<url>' . "\n" . '		<loc>' . $context['url_to_home'] . $context['url_to_root'] . 'sections/</loc>' . "\n" . '		<changefreq>weekly</changefreq>' . "\n" . '		<priority>1.0</priority>' . "\n" . '	</url>' . "\n\n";
    // main sections
    if ($items = Sections::list_by_title_for_anchor(NULL, 0, 25, 'raw')) {
        foreach ($items as $id => $item) {
            $text .= '	<url>' . "\n" . '		<loc>' . encode_link(Sections::get_permalink($item)) . '</loc>' . "\n" . '		<changefreq>weekly</changefreq>' . "\n" . '	</url>' . "\n\n";
        }
    }

 * it is included into the feed as well.
 *
 * @link http://www.w3.org/2003/01/geo/ RDFIG Geo vocab workspace
 *
 * @author Bernard Paques
 * @reference
 * @license http://www.gnu.org/copyleft/lesser.txt GNU Lesser General Public License
 */
// common definitions and initial processing
include_once '../shared/global.php';
// ensure we only provide public content through newsfeeds
$context['users_without_teasers'] = 'Y';
// load the rendering skin
load_skin('feeds');
// get the list from the cache, if possible
$cache_id = Cache::hash('feeds/rdf') . '.xml';
// save for 5 minutes
if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
    $text = '';
    // loads feeding parameters
    Safe::load('parameters/feeds.include.php');
    // set default values
    if (!isset($context['channel_title']) || $context['channel_title']) {
        $context['channel_title'] = $context['site_name'];
    }
    if (!isset($context['channel_description']) || !$context['channel_description']) {
        $context['channel_description'] = $context['site_description'];
    }
    if (!isset($context['webmaster_address']) || !$context['webmaster_address']) {
        $context['webmaster_address'] = $context['site_email'];
    }

 /**
  * list articles
  *
  * @param resource the SQL result
  * @return string the rendered text
  *
  * @see layouts/layout.php
  **/
 function layout($result)
 {
     global $context;
     // we return some text
     $text = '';
     // empty list
     if (!SQL::count($result)) {
         return $text;
     }
     // load the SIMILE Timeline javascript library in shared/global.php
     $context['javascript']['timeline'] = TRUE;
     // sanity check
     if (!isset($this->focus)) {
         $this->focus = 'default';
     }
     // put in cache
     $cache_id = Cache::hash('articles/layout_articles_as_simile:' . $this->focus) . '.xml';
     // save for one minute
     if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 60 < time()) {
         // content of the slideshow
         $content = '<?xml version="1.0" encoding="utf-8"?>' . "\n" . '<data>' . "\n";
         // get a default image
         if (Safe::GetImageSize($context['path_to_root'] . $context['skin'] . '/layouts/map.gif')) {
             $default_href = $context['url_to_root'] . $context['skin'] . '/layouts/map.gif';
         } elseif ($size = Safe::GetImageSize($context['path_to_root'] . 'skins/_reference/layouts/map.gif')) {
             $default_href = $context['url_to_root'] . 'skins/_reference/layouts/map.gif';
         } else {
             $default_href = NULL;
         }
         // process all items in the list
         while ($item = SQL::fetch($result)) {
             // get the related overlay
             $overlay = Overlay::load($item, 'article:' . $item['id']);
             // get the anchor
             $anchor = Anchors::get($item['anchor']);
             // start
             if ($item['publish_date'] > $item['create_date']) {
                 $first = Skin::build_date($item['publish_date'], 'plain');
             } else {
                 $first = Skin::build_date($item['create_date'], 'plain');
             }
             // end
             $last = Skin::build_date($item['edit_date'], 'plain');
             if ($last != $first) {
                 $last = ' end="' . $last . '"';
             } else {
                 $last = '';
             }
             // build a title
             if (is_object($overlay)) {
                 $title = Codes::beautify_title($overlay->get_text('title', $item));
             } else {
                 $title = Codes::beautify_title($item['title']);
             }
             // the url to view this item
             $url = str_replace('&', '&amp;', Articles::get_permalink($item));
             // this is visual
             if (isset($item['icon_url']) && $item['icon_url']) {
                 $image = $item['icon_url'];
             } elseif (isset($item['thumbnail_url']) && $item['thumbnail_url']) {
                 $image = $item['thumbnail_url'];
             } else {
                 $image = '';
             }
             // fix relative path
             if ($image && !preg_match('/^(\\/|http:|https:|ftp:)/', $image)) {
                 $image = $context['url_to_root'] . $image;
             }
             if ($image) {
                 $image = ' image="' . $image . '"';
             }
             // introduction
             $introduction = '';
             if (is_object($overlay)) {
                 $introduction = $overlay->get_text('introduction', $item);
             } else {
                 $introduction = $item['introduction'];
             }
             // insert overlay data, if any
             if (is_object($overlay) && ($data = $overlay->get_text('list', $item))) {
                 if ($introduction) {
                     $introduction .= BR;
                 }
                 $introduction .= $data;
             }
             // ampersands kill SIMILE Timeline
             if ($introduction) {
                 $introduction = encode_field(str_replace(array('&nbsp;', '&'), ' ', Codes::beautify($introduction)));
             }
             // details
             $details = array();
             // info on related comments
//.........这里部分代码省略.........

 * @reference
 * @license http://www.gnu.org/copyleft/lesser.txt GNU Lesser General Public License
 */
// common definitions and initial processing
include_once '../shared/global.php';
include_once 'feeds.php';
// ensure we only provide public content through newsfeeds
$context['users_without_teasers'] = 'Y';
// check network credentials, if any
if ($user = Users::authenticate()) {
    Surfer::empower($user['capability']);
}
// load a skin engine
load_skin('feeds');
// get the list from the cache, if possible
$cache_id = Cache::hash('feeds/describe') . '.xml';
// save for 5 minutes
if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
    $text = '';
    // loads feeding parameters
    Safe::load('parameters/feeds.include.php');
    // set default values
    if (!isset($context['channel_title']) || $context['channel_title']) {
        $context['channel_title'] = $context['site_name'];
    }
    if (!isset($context['channel_description']) || !$context['channel_description']) {
        $context['channel_description'] = $context['site_description'];
    }
    if (!isset($context['webmaster_address']) || !$context['webmaster_address']) {
        $context['webmaster_address'] = $context['site_email'];
    }

/**
 * provide news in the atom format
 *
 * @author Bernard Paques
 * @reference
 * @license http://www.gnu.org/copyleft/lesser.txt GNU Lesser General Public License
 */
// common definitions and initial processing
include_once '../shared/global.php';
// ensure we only provide public content through newsfeeds
$context['users_without_teasers'] = 'Y';
// load the rendering skin
load_skin('feeds');
// get the list from the cache, if possible
$cache_id = Cache::hash('feeds/atom') . '.xml';
// save for 5 minutes
if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
    $text = '';
    // loads feeding parameters
    Safe::load('parameters/feeds.include.php');
    // set default values
    if (!isset($context['channel_title']) || $context['channel_title']) {
        $context['channel_title'] = $context['site_name'];
    }
    if (!isset($context['channel_description']) || !$context['channel_description']) {
        $context['channel_description'] = $context['site_description'];
    }
    if (!isset($context['webmaster_address']) || !$context['webmaster_address']) {
        $context['webmaster_address'] = $context['site_email'];
    }

 * @author Bernard Paques
 * @reference
 * @license http://www.gnu.org/copyleft/lesser.txt GNU Lesser General Public License
 */
// common definitions and initial processing
include_once '../shared/global.php';
// ensure we only provide public content through newsfeeds
$context['users_without_teasers'] = 'Y';
// check network credentials, if any
if ($user = Users::authenticate()) {
    Surfer::empower($user['capability']);
}
// load a skin engine
load_skin('articles');
// get the list from the cache, if possible
$cache_id = Cache::hash('articles/feed') . '.xml';
// save for 5 minutes
if (!file_exists($context['path_to_root'] . $cache_id) || filemtime($context['path_to_root'] . $cache_id) + 300 < time() || !($text = Safe::file_get_contents($context['path_to_root'] . $cache_id))) {
    $text = '';
    // load feeding parameters
    Safe::load('parameters/feeds.include.php');
    // set default values
    if (!isset($context['channel_title']) || !$context['channel_title']) {
        $context['channel_title'] = $context['site_name'];
    }
    if (!isset($context['channel_description']) || !$context['channel_description']) {
        $context['channel_description'] = $context['site_description'];
    }
    if (!isset($context['webmaster_address']) || !$context['webmaster_address']) {
        $context['webmaster_address'] = $context['site_email'];
    }