cache.class.php

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<?php
error_reporting(E_ALL);

/**
* Cache data to a file on the server.
*
* @static
* @author Lorenzo de Kamps
* @since 14-05-2010
* @copyright 2010 - 2011, Lorenzo de Kamps
* @version 1.0 stable
*/

class Cache
{
    public static $dir;
    public static $file;
    public static $lifetime;
    public static $dir_file;
    
    public function __construct($direct)
    {
        try
        {
            self::$dir = $direct;
            if (!is_dir(self::$dir))
            {
                $create = mkdir(self::$dir, 0777);
                if (!$create)
                {
                    Throw new Exeption('Can\'t create cache-directory.');
                }
            }
            
        }
        catch (Exception $e)
        {
            self::ErrorHandler($e->getMessage());
        }
    }
    
    
    public static function isCached($file)
    {
           $string = md5($file);
           self::$dir_file = self::$dir.'/'.$string.'.txt';
           $open = @fopen(self::$dir_file, 'r');
           if ($open)
           {
                return true;
           }
           else
           {
                return false;
           }    
    }
    
    public static function Read($cache)
    {
         try
        {
           $string = md5($cache);
           $open = fopen(self::$dir_file, 'r');
           if ($open)
           {
                    $theData = fread($open,1000000);
                    $un = unserialize($theData);
                    fclose($open);
                                    
                    if ($un['timestamp'] < time() - self::$lifetime)
                    {
                        unlink(self::$dir_file);
                        Cache::Write($cache);
                    }  
                    return $un['data'];  
           }
           else
           {
                throw New Exception('Can\'t open file.');
           }
        }
        catch (Exception $e)
        {
           self::ErrorHandler($e->getMessage());
        }      
    }
    
    public static function Write($item, $lifetime = 300)
    {
        try
        {
            self::$lifetime = $lifetime;
            
           $string = md5($item);
           $create = fopen(self::$dir_file, 'w');
           $file = $item;
           if ($create)
           {
                if ($file)
                {
                    $data = array(
                        'timestamp' => time(),
                        'data'      => $file
                    );
                    fputs($create, serialize($data));
                    fclose($create);
                    return true;
                }
                else
                {
                    throw new Exception('Can\'t read web-adres.');
                }
                
           }
           else
           {
                throw new Exception('Can\'t create file.');
           }
        }
        catch (Exception $e)
        {
           self::ErrorHandler($e->getMessage());
        }      
    }
    
    private static function ErrorHandler($error)
    {
        return print "<pre>".$error."</pre>";
    }
    
}

?>

 
 

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