PHP Surfer::get_capability方法代码示例

 /**
  * check upload capability
  *
  * This function checks surfer overall capability against actual
  * server configuration (PHP parameter 'file_uploads') and also
  * against the parameter [code]users_without_uploads[/code]
  * set in the configuration panel for users.
  *
  * @see users/configure.php
  *
  * @param string actual capability, for possible impersonation (see services/blog.php)
  * @return TRUE if the surfer is allowed to upload files, FALSE otherwise
  */
 public static function may_upload($capability = NULL)
 {
     global $context;
     // sanity check
     if (!$capability) {
         $capability = Surfer::get_capability();
     }
     // server limitation
     if (!ini_get('file_uploads')) {
         return FALSE;
     }
     // administrative permission has not been set
     if (!isset($context['users_without_uploads'])) {
         return TRUE;
     }
     // even associates may not upload files
     if ($context['users_without_uploads'] == 'Y') {
         return FALSE;
     }
     // only associates may upload files
     if ($context['users_without_uploads'] == 'R' && !Surfer::is_associate() && $capability != 'A') {
         return FALSE;
     }
     // surfers are encouraged to share files and images
     return TRUE;
 }

 /**
  * put something into the cache
  *
  * You can store an array or another kind of structured object, but after
  * serialization.
  *
  * The default caching period is 20 minutes (actually, 20m*60s = 1,200s)
  *
  * @param string the id of this item
  * @param string the content to store
  * @param string the topic related to this item
  * @param int the maximum time before expiration, in seconds
  */
 public static function put($id, &$text, $topic = 'global', $duration = 1200, $f_capa = true, $f_lang = true, $f_gmt_off = true)
 {
     global $context;
     // maybe we don't have to cache
     if (isset($context['without_cache']) && $context['without_cache'] == 'Y') {
         return;
     }
     // cache has been poisoned
     if (isset($context['cache_has_been_poisoned']) && $context['cache_has_been_poisoned']) {
         return;
     }
     // the sql back-end may be not available during software updates or on NO_MODEL_PRELOAD
     if (!is_callable(array('SQL', 'query'))) {
         return;
     }
     // cached content depends on surfer capability
     if ($f_capa) {
         $id .= '/' . Surfer::get_capability();
     }
     // cached content depends on selected language
     if ($f_lang) {
         $id .= '/' . $context['language'];
     }
     // cached content depends on time offset
     if ($f_gmt_off) {
         $id .= '/' . Surfer::get_gmt_offset();
     }
     // don't cache more than expected
     $expiry = gmstrftime('%Y-%m-%d %H:%M:%S', time() + $duration);
     // cache also empty content
     if (!$text) {
         $text = ' ';
     }
     // update the database; do not report on error
     $query = "REPLACE INTO " . SQL::table_name('cache') . " SET" . " id='" . SQL::escape($id) . "'," . " text='" . SQL::escape($text) . "'," . " topic='" . SQL::escape($topic) . "'," . " expiry_date='" . $expiry . "'," . " edit_date='" . gmstrftime('%Y-%m-%d %H:%M:%S') . "'";
     SQL::query($query, TRUE);
 }