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  Classes of Tomasz Piotr Wieleba  >  My PHP Page Cache  >  cache.php  >  Download  
File: cache.php
Role: Application script
Content type: text/plain
Description: cache class
Class: My PHP Page Cache
Store and retrieve pages in cache files
Author: By
Last change:
Date: 2013-01-28 15:29
Size: 2,996 bytes
 

Contents

Class file image Download
<?php


class lib_cache {

private $cache_dir = "_cache/";
private $group_prefix = "@";
private $size = 0;

    public function load_page($name,$time=60,$group)
    {
        $name = md5($name);
        $dir = $this->addGroup($group);

        if(@filemtime($dir.$name)>time()-$time)
        {
            echo @file_get_contents($dir.$name);
            return TRUE;
        }
        else
        {
            if(!@ob_start("ob_gzhandler")) @ob_start();
            return FALSE;
        }
    }

    public function save_page($name,$group)
    {
        $name = md5($name);
        $dir = $this->addGroup($group);

        if(@file_exists($dir.$name))
        unlink($dir.$name);

            $page = @ob_get_contents();
            @file_put_contents($dir.$name, $page);
            @ob_get_clean($page);
    }

    public function load($name,$time=60,$group)
    {
        $name = md5($name);
        $dir = $this->addGroup($group);

        if(@filemtime($dir.$name) > time() - $time)
        {
            return unserialize(@file_get_contents($dir.$name));
        }
        else
        {
            return FALSE;
        }
    }

    public function save($name,$value,$group)
    {
        $name = md5($name);
        $dir = $this->addGroup($group);

        if(@file_exists($dir.$name))
        unlink($dir.$name);

            @file_put_contents($dir.$name, serialize($value));
    }

    private function addGroup($name)
    {
        if(!empty($name))
        {
            if(is_dir($this->cache_dir.$this->group_prefix.$name))
            {
                return $this->cache_dir.$this->group_prefix.$name."/";
            }
            else if(@mkdir($this->cache_dir.$this->group_prefix.$name))
            {
                return $this->cache_dir.$this->group_prefix.$name."/";
            }
            else
            {
                return $this->cache_dir;
            }
        }
        else
        {
            return $this->cache_dir;
        }
    }

    public function removeGroup($name)
    {
        foreach(glob($this->cache_dir.$this->group_prefix.$name."/*") as $file)
        {
                unlink($file);
        }

        @rmdir($this->cache_dir.$this->group_prefix.$name);
    }

    public function removeAllGroup()
    {
        foreach(glob($this->cache_dir.$this->group_prefix."*") as $dir)
        {
            foreach(glob($dir."/*") as $file)
            {
                    unlink($file);
            }
            @rmdir($dir);
        }
    }

    public function remove($name,$group)
    {
        @unlink($this->cache_dir.$group."/".md5($name));
    }

    public function removeAll()
    {
        $this->removeAllGroup();

            foreach(glob($this->cache_dir."*") as $file)
            {
                    unlink($file);
            }
    }

    public function checkCacheDir()
    {
        if(is_dir($this->cache_dir) && is_writable($this->cache_dir) && is_readable($this->cache_dir))
        {
            return TRUE;
        }
        else
        {
            return FALSE;
        }
    }

    public function sizeCacheDir()
    {
        foreach(glob($this->cache_dir."*") as $file)
        {
                    $this->size+=filesize($file);
        }

        foreach(glob($this->cache_dir.$this->group_prefix."*") as $dir)
        {
            foreach(glob($dir."/*") as $file)
            {
                    $this->size+=filesize($file);
            }
        }

        if($this->size <= pow(2,20))
        {
            return round($this->size/pow(2,10),2)."kB";
        }
        else
        {
            return round($this->size/pow(2,20),2)."MB";
        }
    }

};

?>