Update/serve cached output
| public _display_cache ( &$CFG, &$URI ) : boolean | ||
| return | boolean | TRUE on success or FALSE on failure |
function _display_cache(&$CFG, &$URI)
{
if ($this->is_logged_in) {
// user is logged in, so don't execute the normal _display_cache
return false;
} else {
// not logged in so lets try and display the cache as normal
return parent::_display_cache($CFG, $URI);
}
}
/**
* An override to the CI cache reading mechanism
* @param object $CFG CI config object
* @param object $URI CI uri object
* @return
*/
function _display_cache(&$CFG, &$URI)
{
if (!function_exists('apc_add')) {
return parent::_display_cache($CFG, $URI);
}
log_message('debug', 'APC Cache Check');
$uri = $CFG->item('base_url') . $CFG->item('index_page') . $URI->uri_string;
$cache_key = md5($uri);
$output = apc_fetch($cache_key);
if ($output === FALSE) {
log_message('debug', 'APC Cache Miss..');
return FALSE;
} else {
log_message('debug', 'APC Cache Hit. Sending to browser.');
}
# Display the cached output
$this->_display($output);
return TRUE;
}
* ------------------------------------------------------
* Load and instantiate the base classes
* ------------------------------------------------------
*/
require BASEPATH . 'libraries/Config' . EXT;
require BASEPATH . 'libraries/Router' . EXT;
require BASEPATH . 'libraries/Output' . EXT;
$CFG = new CI_Config($config);
$RTR = new CI_Router($CFG);
$OUT = new CI_Output();
/*
* ------------------------------------------------------
* Is there a valid cache file? If so, we're done...
* ------------------------------------------------------
*/
if ($OUT->_display_cache($CFG, $RTR) == TRUE) {
exit;
}
/*
* ------------------------------------------------------
* Does the requested controller exist?
* ------------------------------------------------------
*/
if (!file_exists(APPPATH . 'controllers/' . $RTR->fetch_class() . EXT)) {
show_404();
}
/*
* ------------------------------------------------------
* Load and instantiate the remaining base classes
* ------------------------------------------------------
*/
