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  Classes of Sam Stevens  >  MySQL Abstractor  >  Cache.Class.php  >  Download  
File: Cache.Class.php
Role: Auxiliary script
Content type: text/plain
Description: Provides caching support to DBTAL
Class: MySQL Abstractor
MySQL database abstraction layer
Author: By
Last change:
Date: 2007-07-17 03:56
Size: 1,466 bytes
 

Contents

Class file image Download
<?php 

class Cache
{
    private $cacheFile = "";
    private $settings = array();
    private $changed = false;
    private $disabled = false;
    function __construct($cacheFile, $disable=false)
    {
        if ($cacheFile != "")
            $this->cacheFile = $cacheFile;
        if ($disable == true)
            $this->disabled = true;
        else
            $this->Load();
    }
    private function Load()
    {
        $file = @file($this->cacheFile);
        if (!is_array($file))
            return false;
        foreach($file as $key => $line)
        {
            $line = explode(":",$line);
            $this->settings[$line[0]] = str_replace("&#58;",":",eregi_replace("\n$","",$line[1]));
        }
        return true;
    }
    function Get($name)
    {
        if ($this->disabled == true)
            return "";
        if (key_exists($name, $this->settings))
            return $this->settings[$name];
        else
            return false;
    }
    function Set($name,$value)
    {
        if ($this->disabled == true)
            return;
        $this->settings[$name] = $value;
        $this->changed = true;
    }
    function ClearCache()
    {
        if ($this->disabled == true)
            return;
        $this->settings = array();
        $this->Save();
    }
    function Save()
    {
        if ($this->disabled == true)
            return;
        if ($this->changed == false)
            return; //no changes to cache
        $file = fopen($this->cacheFile,"w")
            or die("FATAL ERROR: Cannot write to cache file");
        foreach($this->settings as $name => $value)
        {
            fwrite($file,$name.":".str_replace(":","&#58;",$value)."\n");
        }
        fclose($file);
    }
    
}

?>