PHP Page Cache 页面缓存类 (1)

    一个PHP Page Cache 的页面缓存类，代码结构还不错，大家有需要可以拿来用。

PAGE_CACHE.PHP
<?php
/*  $cache = new Cache("../cache/",20); // 构造函数，创建缓存类对象
   ………………………………
   ………………………………
   ………………………………
    $cache->PutCache();  // 倒出缓存
*/
class Cache
{
    private  $CacheDir = ’Cache’;     /* 缓存目录 */
    private  $SetTimeOut = 10;        /* 缓存过期时间 */
    private  $SetExt = ’.cache’;      /* 缓存文件后缀名 */
    private  $CacheFileUrl = ’’;      /* 缓存文件所在地址 */
    private  $CacheConfigFile = ’’;  /* 缓存文件配置信息 */

    public  $LastUnixTimePoke = 0;   /* 上一次缓存的 Unix 时间戳 */
    public  $CurrentUnixTimePoke = 0;/* 当前缓存的 Unix 时间戳 */
    public  $NextUnixTimePoke = 0;   /* 下一次缓存的 Unix 时间戳 */
    public  $UnixNowToNext = 0;        /* 现在和下一次缓存相差的 Unix 时间戳 */

    public  $LastTimePoke = 0;   /* 上一次缓存的时间 */
    public  $CurrentTimePoke = 0;/* 当前缓存的时间 */
    public  $NextTimePoke = 0;   /* 下一次缓存的时间 */

    public  $DataLength = 0; /* 缓存区内容长度 */
    public  $CacheToPage = ’’; /* 缓存文件内容 */
    private  $SplitTeam = false;  /* 是否分组存放Cache文件 */

    public  $Cache = false;        /* 是否需要缓存，用户外界判断 */

  private  $_IsCache = false; /* 是否能够缓存 */

     public function Cache( $SetTimeOut = 20, $CacheDir = ’Cache’, $SplitTeam = false, $SetExt = ’.cache’)
    {
         $this->CacheDir =  $CacheDir;
         $this->SplitTeam =  $SplitTeam;
        if(!is_numeric( $SetTimeOut))
        {
             $this->ErrResponse(’缓存过期时间设置无效’);
            return false;
        } else {
             $this->SetTimeOut =  $SetTimeOut;
        }
         $this->SetExt =  $SetExt;

        /* 缓存开始 */
        ob_clean();
        ob_start();
        ob_implicit_flush(0);
         $this->CreateCache();
        return true;
    }

    private function CreateCache()
    {
         $_CacheFile = str_replace(’.’,’_’,basename( $_SERVER[’PHP_SELF’])) . ’_’ .
                      md5(basename( $_SERVER[’PHP_SELF’])) .  $this->SetExt;
         $_CacheConfig = str_replace(’.’,’_’,basename( $_SERVER[’PHP_SELF’])) . ’_’ . ’.cof’;

        if(!file_exists( $this->CacheDir))
        {      mkdir( $this->CacheDir,0777);
        }

        if( $this->SplitTeam)
        {
             $_CacheConfigDir =  $this->CacheDir . str_replace(’.’,’_’,basename( $_SERVER[’PHP_SELF’])) . ’_/’;
            if(!file_exists( $_CacheConfigDir))
            {
                mkdir( $_CacheConfigDir,0777);
            }
             $_CacheUrl =  $this->CacheDir .  $_CacheConfigDir .  $_CacheFile;
             $_CacheConfigUrl =  $this->CacheDir .  $_CacheConfigDir .  $_CacheConfig;
        } else {
             $_CacheUrl =  $this->CacheDir .  $_CacheFile;
             $_CacheConfigUrl =  $this->CacheDir .  $_CacheConfig;