Category:Library -> Cache | Category:Library -> Community
Here is an extension for the Output Library that aims to retrieve cached file contents and let you do fragment caching.
You just have to create a file called MY_Output.php in the system/application/libraries folder and put this code in the file :
<?
class MY_Output extends CI_Output {
function My_Output()
{
parent::CI_Output();
}
function get_cached_file($url) {
$CI =& get_instance();
/* defines cache path */
$cache_path = "system/cache/";
if(strlen($CI->config->item('cache_path')) > 0) {
$cache_path = $CI->config->item('cache_path');
}
/* retreives cache file */
$cached_url = base_url().$CI->config->item('index_page')."/".$url;
$cached_file = $cache_path.md5($cached_url);
/* checks if cached file exists */
if(file_exists($cached_file)) {
/* gets cached content and removes timestamp */
$handle = fopen($cached_file, "r")
$contents = fread($handle, filesize($cached_file));
fclose($handle);
$timestamp_pos = strpos($contents, "--->");
$contents = substr($contents, ($timestamp_pos + 4));
return $contents;
}
return FALSE;
}
}
?>
Then the usage is pretty simple. Imagine you’ve called the $this->output->cache(); function from the sample_controller, within the sample_method, then you would access this fragment this way:
http://www.yoursite.com/sample_controller/sample_method/
Then you can use the new get_cached_file function to get the cached contents of this page. And you can do it this way:
$this->output->get_cached_file('sample_controller/sample_method')