/!PHP/???/cache/cache.php

<?php

class cache

{

    var $cache_dir = './cache/';//This is the directory where the cache files will be stored;

    var $cache_time = 120;//How much time will keep the cache files in seconds. 



    var $caching = false;

    var $file = '';



    function cache()

    {

    //Constructor of the class

    $this->file = $this->cache_dir . urlencode( $_SERVER['REQUEST_URI'] );

    if(file_exists($this->file)) $expired = $this->check_expire();

    else $expired = false;

    if ( file_exists ( $this->file ) && ( filemtime ( $this->file ) + $this->cache_time ) > time() && !$expired )

    {

        //Grab the cache:

        $handle = fopen( $this->file , "r");

        do {

        $data = fread($handle, 8192);

        if (strlen($data) == 0) {

            break;

        }

        echo $data;

        } while (true);

        fclose($handle);

        exit();

    }

    else

    {

        //create cache :

        $this->caching = true;

        ob_start();

        $now = time();

        echo "<!--last modified:".$now."-->\n";

    }

    }



    function close()

    {

    //You should have this at the end of each page

    if ( $this->caching )

    {

        //You were caching the contents so display them, and write the cache file

        $data = ob_get_clean();

        echo $data;

        $fp = fopen( $this->file , 'w' );

        fwrite ( $fp , $data );

        fclose ( $fp );

    }

    }

    function check_expire(){

    $fp = fopen($this->file,"r");

    preg_match("/\:([\d]+)\-/",fread($fp,200),$time);

    $modify_time = $time[1];

    if($modify_time<filemtime($_SERVER['SCRIPT_FILENAME'])){

        return true;

    }

    else{

        return false;

    }



    }

}

?>