PHP Safe::unserialize方法代码示例

    if (!Surfer::is_logged()) {
        Safe::redirect($context['url_to_home'] . $context['url_to_root'] . 'users/login.php?url=' . urlencode(Versions::get_url($item['id'])));
    }
    // permission denied to authenticated user
    Safe::header('Status: 401 Unauthorized', TRUE, 401);
    Logger::error(i18n::s('You are not allowed to perform this operation.'));
    // re-enforce the canonical link
} elseif ($context['self_url'] && ($canonical = $context['url_to_home'] . $context['url_to_root'] . Versions::get_url($item['id'])) && strncmp($context['self_url'], $canonical, strlen($canonical))) {
    Safe::header('Status: 301 Moved Permanently', TRUE, 301);
    Safe::header('Location: ' . $canonical);
    Logger::error(Skin::build_link($canonical));
    // display the version
} else {
    // display details for this version
    $context['text'] .= '<dl class="version">' . "\n";
    if (($attributes = Safe::unserialize($item['content'])) && @count($attributes)) {
        $fields = array('title' => array(i18n::s('Title'), '', FALSE), 'introduction' => array('', '', TRUE), 'overlay' => array('', '', FALSE, i18n::s('Content of the overlay has changed')), 'description' => array('', '', TRUE), 'tags' => array(i18n::s('Tags'), '', TRUE), 'trailer' => array(i18n::s('Trailer'), BR, FALSE), 'extra' => array(i18n::s('Extra'), BR, FALSE));
        foreach ($fields as $name => $params) {
            if (isset($attributes[$name])) {
                $compared = $anchor->diff($name, $attributes[$name]);
                if ($params[2] || strcmp($compared, $attributes[$name])) {
                    // use a constant string instead of showing differences
                    if (isset($params[3])) {
                        $compared = '<ins>' . $params[3] . '</ins>';
                    }
                    if ($params[0]) {
                        $context['text'] .= '<div style="margin-bottom: 1em;">' . sprintf(i18n::s('%s: %s'), $params[0], $params[1] . $compared) . '</div>';
                    } else {
                        $context['text'] .= '<div style="margin-bottom: 1em;">' . $params[1] . $compared . '</div>';
                    }
                }

 /**
  * pull most recent notification
  *
  * This script will wait for new updates before providing them to caller.
  * Because of potential time-outs, you have to care of retries.
  *
  * @return array attributes of the oldest notification, if any
  *
  * @see users/heartbit.php
  */
 public static function pull()
 {
     global $context;
     // return by reference
     $output = NULL;
     // only authenticated surfers can be notified
     if (!Surfer::get_id()) {
         Safe::header('Status: 401 Unauthorized', TRUE, 401);
         die(i18n::s('You are not allowed to perform this operation.'));
     }
     // only consider recent records -- 180 = 3 minutes * 60 seconds
     $threshold = gmstrftime('%Y-%m-%d %H:%M:%S', time() - 180);
     // the query to get time of last update
     $query = "SELECT * FROM " . SQL::table_name('notifications') . " AS notifications " . " WHERE (notifications.recipient = " . SQL::escape(Surfer::get_id()) . ")" . "\tAND (edit_date >= '" . SQL::escape($threshold) . "')" . " ORDER BY notifications.edit_date" . " LIMIT 1";
     // stop if there is nothing to return
     if (!($record = SQL::query_first($query)) || !isset($record['data'])) {
         return 'NTR';
     }
     // restore the entire record
     $output = Safe::unserialize($record['data']);
     // localize on server-side message displayed by the client software
     $lines = array();
     switch ($output['type']) {
         case 'alert':
             // a new item has been created
             if (strpos($output['action'], ':create')) {
                 $lines[] = sprintf(i18n::s('New page: %s'), $output['title']) . "\n" . sprintf(i18n::s('%s by %s'), ucfirst(Anchors::get_action_label($output['action'])), $output['nick_name']) . "\n";
                 // surfer prompt
                 $lines[] = i18n::s('Would you like to browse the page?');
                 // else consider this as an update
             } else {
                 // provide a localized message
                 $lines[] = sprintf(i18n::s('Updated: %s'), $output['title']) . "\n" . sprintf(i18n::s('%s by %s'), ucfirst(Anchors::get_action_label($output['action'])), $output['nick_name']) . "\n";
                 // surfer prompt
                 $lines[] = i18n::s('Would you like to browse the page?');
             }
             break;
         case 'browse':
             // message is optional
             if (isset($output['message']) && trim($output['message'])) {
                 $lines[] = sprintf(i18n::s('From %s:'), $output['nick_name']) . "\n" . $output['message'] . "\n";
             }
             // address is mandatory
             $lines[] = i18n::s('Would you like to browse the page?');
             break;
         case 'hello':
             // message is optional
             if (isset($output['message']) && trim($output['message'])) {
                 $lines[] = sprintf(i18n::s('From %s:'), $output['nick_name']) . "\n" . $output['message'] . "\n";
             }
             // address is present on new chat
             if (isset($output['address']) && trim($output['address'])) {
                 $lines[] = i18n::s('Would you like to browse the page?');
             }
             break;
     }
     // content of the dialog box that will be displayed to surfer
     if (count($lines)) {
         $output['dialog_text'] = implode("\n", $lines);
     }
     // forget this notification
     $query = "DELETE FROM " . SQL::table_name('notifications') . " WHERE id = " . SQL::escape($record['id']);
     SQL::query($query, TRUE);
     // return the new notification
     return $output;
 }

 /**
  * restore an old version
  *
  * This function returns the content of a previous version,
  * and also purges the stack of previous versions.
  *
  * This function populates the error context, where applicable.
  *
  * @param int the id of the version to restore
  * @return TRUE on success, FALSE otherwise
  */
 public static function restore($id)
 {
     global $context;
     // sanity check
     if (!$id) {
         return TRUE;
     }
     // select among available items -- exact match
     $query = "SELECT * FROM " . SQL::table_name('versions') . " AS versions" . " WHERE (versions.id = " . SQL::escape($id) . ")";
     if (!($item = SQL::query_first($query))) {
         return FALSE;
     }
     // retrieve the related anchor
     $anchor = Anchors::get($item['anchor']);
     if (!is_object($anchor)) {
         Logger::error(sprintf(i18n::s('Unknown anchor %s'), $item['anchor']));
         return FALSE;
     }
     // inflate the serialized object if necessary
     if (strncmp($item['content'], 'a:', 2) && is_callable('gzuncompress')) {
         $item['content'] = gzuncompress(base64_decode($item['content']));
     }
     // restore the anchor
     if (!$anchor->restore(Safe::unserialize($item['content']))) {
         Logger::error(i18n::s('Impossible to restore the previous version.'));
         return FALSE;
     }
     // delete records attached to this anchor after version date
     $query = "DELETE FROM " . SQL::table_name('versions') . " WHERE (anchor LIKE '" . SQL::escape($item['anchor']) . "')" . " AND (edit_date >= '" . SQL::escape($item['edit_date']) . "')";
     SQL::query($query);
     // anchor has been restored
     return TRUE;
 }

 /**
  * restore an instance
  *
  * This function unserializes piggy-back data and uses it to populate an overlay instance.
  *
  * [php]
  * // get the record from the database
  * $item = Articles::get($id);
  *
  * // extract overlay data from $item['overlay']
  * $overlay = Overlay::load($item, 'article:'.$item['id']);
  * [/php]
  *
  * @see articles/delete.php
  * @see articles/edit.php
  * @see articles/view.php
  *
  * @param array the hosting array
  * @param string reference of the containing page (e.g., 'article:123')
  * @return a restored instance, or NULL
  */
 public static final function load($host, $reference = '')
 {
     global $context;
     if (is_object($host)) {
         $data = $host->item;
     } else {
         $data = $host;
     }
     // no overlay yet
     if (!isset($data['overlay']) || !$data['overlay']) {
         return NULL;
     }
     // retrieve the content of the overlay
     if (($attributes = Safe::unserialize($data['overlay'])) === FALSE) {
         return NULL;
     }
     // restore unicode entities
     foreach ($attributes as $name => $value) {
         if (is_string($value)) {
             $attributes[$name] = utf8::from_unicode($value);
         }
     }
     // we need a type
     if (!is_array($attributes) || !isset($attributes['overlay_type'])) {
         return NULL;
     }
     // bind this to current page
     if (isset($data['id'])) {
         $attributes['id'] = $data['id'];
     }
     // use one particular overlay instance
     $overlay = Overlay::bind($attributes['overlay_type']);
     if (is_object($overlay)) {
         $overlay->attributes = $attributes;
         // expose all of the anchor interface to the contained overlay
         if (!is_object($host)) {
             $overlay->anchor = Anchors::get($reference);
         } else {
             $overlay->anchor = $host;
         }
         // ready to use!
         return $overlay;
     }
     // unknown overlay type or empty overlay
     return NULL;
 }

    // display the image full size
} else {
    // initialize the rendering engine
    Codes::initialize(Images::get_url($item['id']));
    // page main content
    //
    // insert anchor prefix
    if (is_object($anchor)) {
        $context['text'] .= $anchor->get_prefix();
    }
    // retrieve slideshow links if we have an anchor
    if (is_object($anchor)) {
        // retrieve information from cache, if any
        $cache_id = 'images/view.php?id=' . $item['id'] . '#navigation';
        if ($data = Cache::get($cache_id)) {
            $data = Safe::unserialize($data);
        } else {
            $data = $anchor->get_neighbours('image', $item);
            // save in cache
            $text = serialize($data);
            Cache::put($cache_id, $text, 'images');
        }
        // links to display previous and next pages, if any
        $context['text'] .= Skin::neighbours($data, 'slideshow');
        // a meta link to prefetch the next page
        if (isset($data[2]) && $data[2]) {
            $context['page_header'] .= "\n" . '<link rel="next" href="' . $context['url_to_root'] . $data[2] . '" title="' . encode_field($data[3]) . '" />';
        }
    }
    // image description
    $context['text'] .= Skin::build_block($item['description'], 'description');

$credentials = NULL;
if (isset($_REQUEST['credentials'])) {
    $credentials = $_REQUEST['credentials'];
} elseif (isset($context['arguments'][0])) {
    $credentials = $context['arguments'][0];
}
$credentials = strip_tags($credentials);
// fix credentials if followed by text
if ($credentials && ($position = strpos($credentials, '-'))) {
    $credentials = substr($credentials, 0, $position);
}
// data has been serialized, then base64 encoded
if ($credentials && ($credentials = base64_decode($credentials))) {
    // json is more efficient, but we may have to fall-back to php serialization
    if (!($credentials = Safe::json_decode($credentials))) {
        $credentials = Safe::unserialize($credentials);
    }
}
// load localized strings
if (is_callable(array('i18n', 'bind'))) {
    i18n::bind('users');
}
// load the skin
load_skin('users');
// page title
if (!Surfer::is_logged()) {
    $context['page_title'] = i18n::s('Who are you?');
} else {
    $context['page_title'] = i18n::s('You are') . ' ' . Surfer::get_name();
}
// stop crawlers