<?php

/**
 * @author vee
 */

class MY_Output extends CI_Output
{


    public function __construct()
    {
        parent::__construct();
    }// __construct


    /**
     * Update/serve a cached file
     *
     * @access    public
     * @return    void
     */
    public function _display_cache(&$CFG, &$URI)
    {
        $cache_path = ($CFG->item( cache_path ) ==   ) ? APPPATH. cache/  : $CFG->item( cache_path );

        // Build the file path.  The file name is an MD5 hash of the full URI
        $uri = $CFG->item( base_url ).
                $CFG->item( index_page ).
                $URI->uri_string;
        // buld query strings
        $querystrings = $_SERVER[ QUERY_STRING ];
        if ( $querystrings != null ) {$querystrings = "?".$querystrings;}
        $uri = $uri.$querystrings;

        $filepath = $cache_path.md5($uri);

        if ( ! @file_exists($filepath))
        {
            return FALSE;
        }

        if ( ! $fp = @fopen($filepath, FOPEN_READ))
        {
            return FALSE;
        }

        flock($fp, LOCK_SH);

        $cache =   ;
        if (filesize($filepath) > 0)
        {
            $cache = fread($fp, filesize($filepath));
        }

        flock($fp, LOCK_UN);
        fclose($fp);

        // Strip out the embedded timestamp
        if ( ! preg_match("/(d+TS--->)/", $cache, $match))
        {
            return FALSE;
        }

        // Has the file expired? If so we ll delete it.
        if (time() >= trim(str_replace( TS---> ,   , $match[ 1 ])))
        {
            if (is_really_writable($cache_path))
            {
                @unlink($filepath);
                log_message( debug , "Cache file has expired. File deleted");
                return FALSE;
            }
        }

        // Display the cache
        $this->_display(str_replace($match[ 0 ],   , $cache));
        log_message( debug , "Cache file is current. Sending it to browser.");
        return TRUE;
    }// _display_cache


    /**
     * Write a Cache File
     *
     * @access    public
     * @return    void
     */
    public function _write_cache($output)
    {
        $CI =& get_instance();
        $path = $CI->config->item( cache_path );

        $cache_path = ($path ==   ) ? APPPATH. cache/  : $path;

        if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
        {
            log_message( error , "Unable to write cache file: ".$cache_path);
            return;
        }

        $uri = $CI->config->item( base_url ).
                $CI->config->item( index_page ).
                $CI->uri->uri_string();
        // buld query strings
        $querystrings = $_SERVER[ QUERY_STRING ];
        if ( $querystrings != null ) {$querystrings = "?".$querystrings;}
        $uri = $uri.$querystrings;

        $cache_path .= md5($uri);

        if ( ! $fp = @fopen($cache_path, FOPEN_WRITE_CREATE_DESTRUCTIVE))
        {
            log_message( error , "Unable to write cache file: ".$cache_path);
            return;
        }

        $expire = time() + ($this->cache_expiration * 60);

        if (flock($fp, LOCK_EX))
        {
            fwrite($fp, $expire. TS---> .$output);
            flock($fp, LOCK_UN);
        }
        else
        {
            log_message( error , "Unable to secure a file lock for file at: ".$cache_path);
            return;
        }
        fclose($fp);
        @chmod($cache_path, FILE_WRITE_MODE);

        log_message( debug , "Cache file written: ".$cache_path);
    }// _write_cache


}

清除应用程序/缓存中的所有缓存文件和文件夹。

Original answer (2011)

this can fix codeigniter cache with querystring codeigniter cache with querystring

这是一个泰语页面，但您可以复制该代码并将其放入application/core/MY_Output.php中：）