Clear Page Cache

Category:Library | Category:Library::Community | Category:Library::Cache

Delete the cache for the current page or for the page at the URI supplied by the first parameter.

[code]// Deletes the current page's cache; $this->output->clear_page_cache();[/code]

[code]// Deletes the cache for "/welcome/index"; $this->output->clear_page_cache('welcome/index')[/code]

[code]// Deletes the exact cache file 67d8b8110269ea53756e4d7090152bfc; $filepath = $this->config->item('cache_path').'67d8b8110269ea53756e4d7090152bfc'; $this->output->clear_page_cache(null, $filepath);[/code]

For flashdata, call it before you redirect: [code]$this->clear_page_cache($newURI); $this->session->flashdata('logout','Laters!'); redirect($newURI);[/code]

[code]<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

/**

• Cache file naming routine factored out to allow for manual deletion.

• Responsible for sending final output to browser

• @package CodeIgniter

• @subpackage Libraries

• @hacked-by Bradford Mar */ class MY_Output extends CI_Output {

  /**

  • Get the uri of a given cached page
  • @access public
  • @return
    */

  function get_cache_URI($set_uri = null){ $CFG =& load_class('Config'); $URI =& load_class('URI');

   $set_uri = (isset($set_uri)) ? $set_uri : $URI->uri_string;
  
   $cache_path = ($CFG->item('cache_path') == '') ? BASEPATH.'cache/' : $CFG->item('cache_path');
   
   if ( ! is_dir($cache_path) OR ! is_writable($cache_path))
   {
        return FALSE;
    }
   
   /*
    * Build the file path.  The file name is an MD5 hash of the full URI
    */
   $uri =    $CFG->item('base_url').
           $CFG->item('index_page').
           $set_uri;
   
   return array('path'=>$cache_path, 'uri'=>$uri);
  

  }

  // --------------------------------------------------------------------

  /**

  • Manually clear a cached file
  • @access public
  • @return void */

  function clear_page_cache($set_uri = null, $filepath = null){ switch (isset($filepath)) { case FALSE: $cacheuri = $this->get_cache_URI($set_uri); $filepath = $cacheuri['path']; $filepath .= md5($cacheuri['uri']);
  default: if(file_exists($filepath)) { touch($filepath); unlink($filepath); log_message('debug', "Cache deleted for: ".$cacheuri['uri']); } else { return FALSE; } break; } } } // END MY_Output Class

/* End of file MY_Output.php / / Location: ./system/application/libraries/MY_Output.php */[/code]