<?php
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/**
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* @param string $cache_dir 缓文件夹
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* @param int $cache_create_time 文件缓存时间
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* @example $cache=new Esj_Cache('./_cache',100)
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* @example $cache->Read_Cache() 读取缓存并输出
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* @example $cache->creatre_cache() 创建缓存文件(放在文件未尾)
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* @example $cache->CacheList() 返回所有缓存文件列表
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* @example $cache->Del_Cache() 删除所有缓存文件
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*/
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ob_start();
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class Phpyun_Cache
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{
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private $cache_dir = "./cache";
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// cacher文件夹
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private $web_dir = '';
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// 站点目录
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private $cache_time = 3600;
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// cache文件的建立时间
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public function __construct($cache_dir, $web_dir, $cache_time = 3600)
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{
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ob_start();
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$this->web_dir = $web_dir;
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$this->cache_dir = $cache_dir;
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$this->cache_time = $cache_time;
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}
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public function Read_Cache()
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{ // 读取缓存
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if (count($_POST) > 0 || $_GET[m] == "ajax" || $_GET[m] == "includejs") {
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return false;
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}
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try {
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if (self::Create_Dir($this->cache_dir)) {
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self::Get_Cache(); // 输出缓存文件信息
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} else {
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echo "缓存文件夹创建失败!";
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return false;
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}
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} catch (Exception $e) {
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echo $e;
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return false;
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}
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}
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private function Exist_Dir($foler)
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{ // 测试缓存文件夹是否存在
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if (@file_exists($this->web_dir . "/" . $foler)) {
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return true;
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} else {
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return false;
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}
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}
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private function Create_Dir($foler)
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{ // 建立一个新的文件夹
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if (! self::Exist_Dir($foler)) {
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try {
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@mkdir($this->web_dir . "/" . $foler, 0777);
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@chmod($this->web_dir . "/" . $foler, 0777);
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return true;
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} catch (Exception $e) {
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self::Get_Cache(); // 输出缓存
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return false;
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}
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return false;
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} else {
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return true;
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}
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}
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private function Get_Cache()
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{ // 读取缓存文件
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$file_name = self::get_CacheName();
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if (@file_exists($file_name) && ((filemtime($file_name) + $this->cache_time) > time())) {
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$content = @file_get_contents($file_name);
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if (isset($content)) {
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if (! empty($content)) {
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echo $content;
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ob_end_flush();
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exit();
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}
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} else {
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echo "缓存文件读取失败";
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exit();
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}
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} elseif (@file_exists($file_name)) {
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$this->Del_Cache();
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}
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}
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private function get_CacheName()
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{ // 返回文件的名字
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$name = $_SERVER['HTTP_HOST'] . $_SERVER["REQUEST_URI"];
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if ($_COOKIE['cityid']) {
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$name .= $_COOKIE['cityid'] . $_COOKIE['host'];
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}
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$filename = $file_name = $this->web_dir . '/' . $this->cache_dir . '/' . md5($name) . ".html";
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return $filename;
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}
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public function CacheCreate()
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{ // 建立缓存文件
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$filename = self::get_CacheName();
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if ($filename != "") {
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try {
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$op = ob_get_contents();
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if (! empty($op)) {
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@file_put_contents($filename, $op);
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}
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return true;
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} catch (Exception $e) {
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echo "缓存文件写入失败:" . $e;
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exit();
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}
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return true;
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}
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}
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public function CacheList()
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{ // 取得缓存中的所有文件
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$path = $this->cache_dir;
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if ($handle = opendir($path)) {
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while (false !== ($file = readdir($handle))) {
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if ($file != "." && $file != "..") {
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$path1 = $path . "/" . $file;
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if (@file_exists($path1)) {
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$result[] = $file;
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}
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}
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}
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@closedir($handle);
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}
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return $result;
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}
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public function Del_Cache()
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{ // 删除缓存中的所有文件
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$path = $this->web_dir . $this->cache_dir;
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if ($handle = @opendir($path)) {
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while (false !== ($file = @readdir($handle))) {
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if ($file != "." && $file != "..") {
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$path1 = $path . "/" . $file;
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if (@file_exists($path1)) {
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@unlink($path1);
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}
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}
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}
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@closedir($handle);
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}
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return true;
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}
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}
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?>
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