php文件缓存类汇总

<?php
$fzz = new fzz_cache;
$fzz->kk = $_SERVER; //写入缓存
//$fzz->set("kk",$_SERVER,10000); //此办法不与类属性想冲突,可以用任意缓存名；
print_r($fzz->kk);? //读取缓存
//print_r($fzz->get("kk"));
//unset($fzz->kk); //删除缓存
//$fzz->_unset("kk");
var_dump(isset($fzz->kk)); //判断缓存是否存在
//$fzz->_isset("kk");
//$fzz->clear(); //清理过期缓存
//$fzz->clear_all(); //清理所有缓存文件
class fzz_cache{
?public $limit_time = 20000; //缓存过期时间
?public $cache_dir = "data"; //缓存文件保存目录
?//写入缓存
?function __set($key,$val){
? $this->_set($key,$val);
?}
?//第三个参数为过期时间
?function _set($key,$val,$limit_time=null){?
? $limit_time = $limit_time ? $limit_time : $this->limit_time;
? $file = $this->cache_dir."/".$key.".cache";
? $val = serialize($val);
? @file_put_contents($file,$val) or $this->error(__line__,"fail to write in file");
? @chmod($file,0777);
? @touch($file,time()+$limit_time) or $this->error(__line__,"fail to change time");
?}

?//读取缓存
?function __get($key){
? return $this->_get($key);
?}
?function _get($key){
? $file = $this->cache_dir."/".$key.".cache";
? if (@filemtime($file)>=time()){
?? return unserialize(file_get_contents($file));
? }else{
?? @unlink($file) or $this->error(__line__,"fail to unlink");
?? return false;
? }
?}PHP编程

?//删除缓存文件
?function __unset($key){
? return $this->_unset($key);
?}
?function _unset($key){
? if (@unlink($this->cache_dir."/".$key.".cache")){
?? return true;
? }else{
?? return false;
? }
?}PHP编程

?//检查缓存是否存在,过期则认为不存在
?function __isset($key){
? return $this->_isset($key);
?}
?function _isset($key){
? $file = $this->cache_dir."/".$key.".cache";
? if (@filemtime($file)>=time()){
?? return true;
? }else{
?? @unlink($file) ;
?? return false;
? }
?}PHP编程

?//清除过期缓存文件
?function clear(){
? $files = scandir($this->cache_dir);
? foreach ($files as $val){
?? if (filemtime($this->cache_dir."/".$val)<time()){
??? @unlink($this->cache_dir."/".$val);
?? }
? }
?}PHP编程

?//清除所有缓存文件
?function clear_all(){
? $files = scandir($this->cache_dir);
? foreach ($files as $val){
?? @unlink($this->cache_dir."/".$val);
? }
?}
?
?function error($msg,$debug = false) {
? $err = new Exception($msg);
? $str = "<pre>
<span style='color:red'>error:</span>
".print_r($err->getTrace(),1)."
</pre>";
? if($debug == true) {
?? file_put_contents(date('Y-m-d H_i_s').".log",$str);
?? return $str;
? }else{
?? die($str);
? }
?}
}
?>PHP编程

<?php
define('DIRECTORY_SEPARATOR','/');
define('FOPEN_WRITE_CREATE_DESTRUCTIVE','wb');
define('FOPEN_WRITE_CREATE','ab');
define('DIR_WRITE_MODE',0777);
class FileCache {
?/**
???? * 缓存路径
???? *
???? * @access private
???? * @var string
???? */
?private $_cache_path;
?/**
???? * 缓存过期时间,单位是秒second
???? *
???? * @access private
???? * @var int
???? */
?private $_cache_expire;
?
?/**
???? * 解析函数,设置缓存过期实践和存储路径
???? *
???? * @access public
???? * @return void
???? */
?public function __construct($expire,$cache_path)
?{
? $this->_cache_expire = $expire;
? $this->_cache_path = $cache_path;
?}
?
?/**
???? * 缓存文件名
???? *
???? * @access public
???? * @param? string $key
???? * @return void
???? */
?private function _file($key)
?{
? return $this->_cache_path . md5($key);
?}
?
?/**
???? * 设置缓存
???? *
???? * @access public
???? * @param? string $key 缓存的唯一键
???? * @param? string $data 缓存的内容
???? * @return bool
???? */
?public function set($key,$data)
?{
? $value = serialize($data);
?
? $file = $this->_file($key);
?
???? return $this->write_file($file,$value);
?}
?
?/**
???? * 获取缓存
???? *
???? * @access public
???? * @param? string $key 缓存的唯一键
???? * @return mixed
???? */
?public function get($key)
?{
? $file = $this->_file($key);
?
? /** 文件不存在或目录不可写 */
? if (!file_exists($file) || !$this->is_really_writable($file))
? {
?? return false;
? }
?
? /** 缓存没有过期,仍然可用 */
? if ( time() < (filemtime($file) + $this->_cache_expire) )
? {
??
?? $data = $this->read_file($file);
??
?? if(FALSE !== $data)
?? {
??? return unserialize($data);
?? }
??
?? return FALSE;
? }
?
? /** 缓存过期,删除之 */
? @unlink($file);
? return FALSE;
? }
?
? function read_file($file)
?{
? if ( ! file_exists($file))
? {
?? return FALSE;
? }
?
? if (function_exists('file_get_contents'))
? {
?? return file_get_contents($file);?
? }
? if ( ! $fp = @fopen($file,FOPEN_READ))
? {
?? return FALSE;
? }
?
? flock($fp,LOCK_SH);//读取之前加上共享锁
?
? $data = '';
? if (filesize($file) > 0)
? {
?? $data =& fread($fp,filesize($file));
? }
? flock($fp,LOCK_UN);//释放锁
? fclose($fp);
? return $data;
?}
?
? function write_file($path,$data,$mode = FOPEN_WRITE_CREATE_DESTRUCTIVE)
?{
? if ( ! $fp = @fopen($path,$mode))
? {
?? return FALSE;
? }
?
? flock($fp,LOCK_EX);
? fwrite($fp,$data);
? flock($fp,LOCK_UN);
? fclose($fp);
?
? return TRUE;
?}
?function is_really_writable($file)//兼容各平台判断文件是否有写入权限
?{
? // If we're on a Unix server with safe_mode off we call is_writable
? if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE)
? {
?? return is_writable($file);
? }
?
? // For windows servers and safe_mode "on" installations we'll actually
? // write a file then read it.? Bah...
? if (is_dir($file))
? {
?? $file = rtrim($file,'/').'/'.md5(rand(1,100));
?
?? if (($fp = @fopen($file,FOPEN_WRITE_CREATE)) === FALSE)
?? {
??? return FALSE;
?? }
?
?? fclose($fp);
?? @chmod($file,DIR_WRITE_MODE);
?? @unlink($file);
?? return TRUE;
? }
? elseif (($fp = @fopen($file,FOPEN_WRITE_CREATE)) === FALSE)
? {
?? return FALSE;
? }
?
? fclose($fp);
? return TRUE;
?}
}
$cache = new FileCache(30,'cache/');
$cache->set('test','this is a test.');
print $cache->get('test');
/* End of file FlieCache.php */

<?php
class cache
{
?private static $_instance = null;
??? protected $_options = array(
??????? 'cache_dir'??????? => "./",
??????? 'file_name_prefix' => 'cache',
???? 'mode'??????????? => '1',//mode 1 为serialize model 2为保存为可执行文件
??? );
?
?/**
? * 得到本类实例
? *
? * @return Ambiguous
? */
?public static function getInstance()
?{
? if(self::$_instance === null)
? {
?? self::$_instance = new self();
? }
? return self::$_instance;
?}
?
?/**
? * 得到缓存信息
? *
? * @param string $id
? * @return boolean|array
? */
?public static function get($id)
?{
? $instance = self::getInstance();
?
? //缓存文件不存在
? if(!$instance->has($id))
? {
?? return false;
? }
?
? $file = $instance->_file($id);
?
? $data = $instance->_fileGetContents($file);
?
? if($data['expire'] == 0 || time() < $data['expire'])
? {
?? return $data['contents'];
? }
? return false;
?}
?
?/**
? * 设置一个缓存
? *
? * @param string $id?? 缓存id
? * @param array? $data 缓存内容
? * @param int??? $cacheLife 缓存生命 默认为0无限生命
? */
?public static function set($id,$cacheLife = 0)
?{
? $instance = self::getInstance();
?
? $time = time();
? $cache????? = array();
? $cache['contents'] = $data;
? $cache['expire']?? = $cacheLife === 0 ? 0 : $time + $cacheLife;
? $cache['mtime']??? = $time;
?
? $file = $instance->_file($id);
?
? return $instance->_filePutContents($file,$cache);
?}
?
??? /**
???? * 清除一条缓存
???? *
???? * @param string cache id?
???? * @return void
???? */??
?public static function delete($id)
?{
? $instance = self::getInstance();
?
? if(!$instance->has($id))
? {
?? return false;
? }
???? $file = $instance->_file($id);
???? //删除该缓存
???? return unlink($file);
?}
?
?/**
? * 判断缓存是否存在
? *
? * @param string $id cache_id
? * @return boolean true 缓存存在 false 缓存不存在
? */
?public static function has($id)
?{
? $instance = self::getInstance();
? $file???? = $instance->_file($id);
?
? if(!is_file($file))
? {
?? return false;
? }
? return true;
?}
?
?/**
? * 通过缓存id得到缓存信息路径
? * @param string $id
? * @return string 缓存文件路径
? */
?protected function _file($id)
?{
? $instance? = self::getInstance();
? $fileNmae? = $instance->_idToFileName($id);
? return $instance->_options['cache_dir'] . $fileNmae;
?}
?
?/**
? * 通过id得到缓存信息存储文件名
? *
? * @param? $id
? * @return string 缓存文件名
? */
?protected function _idToFileName($id)
?{
? $instance? = self::getInstance();
? $prefix??? = $instance->_options['file_name_prefix'];
? return $prefix . '---' . $id;
?}
?
?/**
? * 通过filename得到缓存id
? *
? * @param? $id
? * @return string 缓存id
? */
?protected function _fileNameToId($fileName)
?{
? $instance? = self::getInstance();
? $prefix??? = $instance->_options['file_name_prefix'];
? return preg_replace('/^' . $prefix . '---(.*)$/','$1',$fileName);
?}
?
?/**
? * 把数据写入文件
? *
? * @param string $file 文件名称
? * @param array? $contents 数据内容
? * @return bool
? */
?protected function _filePutContents($file,$contents)
?{
? if($this->_options['mode'] == 1)
? {
?? $contents = serialize($contents);
? }
? else
? {
?? $time = time();
???????? $contents = "<?phpn".
???????????????? " // mktime: ". $time. "n".
???????????????? " return ".
???????????????? var_export($contents,true).
???????????????? "n?>";
? }
?
? $result = false;
???? $f = @fopen($file,'w');
??????? if ($f) {
??????????? @flock($f,LOCK_EX);
??????????? fseek($f,0);
??????????? ftruncate($f,0);
??????????? $tmp = @fwrite($f,$contents);
??????????? if (!($tmp === false)) {
??????????????? $result = true;
??????????? }
??????????? @fclose($f);
??????? }
? @chmod($file,0777);
? return $result;???
?}
?
?/**
? * 从文件得到数据
? *
? * @param? sring $file
? * @return boolean|array
? */
?protected function _fileGetContents($file)
?{
? if(!is_file($file))
? {
?? return false;
? }
?
? if($this->_options['mode'] == 1)
? {
?? $f = @fopen($file,'r');
?? @$data = fread($f,filesize($file));
?? @fclose($f);
?? return unserialize($data);
? }
? else
? {
?? return include $file;
? }
?}
?
?/**
? * 构造函数
? */
?protected function __construct()
?{
?
?}
?
?/**
? * 设置缓存路径
? *
? * @param string $path
? * @return self
? */
?public static function setCacheDir($path)
?{
? $instance? = self::getInstance();
??????? if (!is_dir($path)) {
??????????? exit('file_cache: ' . $path.' 不是一个有效路径 ');
??????? }
??????? if (!is_writable($path)) {
??????????? exit('file_cache: 路径 "'.$path.'" 不可写');
??????? }
???
??????? $path = rtrim($path,'/') . '/';
??????? $instance->_options['cache_dir'] = $path;
???????
??????? return $instance;
?}
?
?/**
? * 设置缓存文件前缀
? *
? * @param srting $prefix
? * @return self
? */
?public static function setCachePrefix($prefix)
?{
? $instance? = self::getInstance();
? $instance->_options['file_name_prefix'] = $prefix;
? return $instance;
?}
?
?/**
? * 设置缓存存储类型
? *
? * @param int $mode
? * @return self
? */
?public static function setCacheMode($mode = 1)
?{
? $instance? = self::getInstance();
? if($mode == 1)
? {
?? $instance->_options['mode'] = 1;
? }
? else
? {
?? $instance->_options['mode'] = 2;
? }
?
? return $instance;
?}
?
?/**
? * 删除所有缓存
? * @return boolean
? */
?public static function flush()
?{
? $instance? = self::getInstance();
? $glob = @glob($instance->_options['cache_dir'] . $instance->_options['file_name_prefix'] . '--*');
?
? if(empty($glob))
? {
?? return false;
? }
?
? foreach ($glob as $v)
? {
?? $fileName = basename($v);
?? $id =? $instance->_fileNameToId($fileName);
?? $instance->delete($id);
? }
? return true;
?}
}
/* 初始化设置cache的配置信息什么的 */
cache::setCachePrefix('core'); //设置缓存文件前缀
cache::setCacheDir('./cache'); //设置存放缓存文件夹路径
//模式1 缓存存储方式
//a:3:{s:8:"contents";a:7:{i:0;i:1;i:1;i:2;i:2;i:3;i:3;i:34;i:4;i:5;i:5;i:6;i:6;i:6;}s:6:"expire";i:0;s:5:"mtime";i:1318218422;}
//模式2 缓存存储方式
/*
?<?php
?// mktime: 1318224645
?return array (
? 'contents' =>
? array (
??? 0 => 1,
??? 1 => 2,
??? 2 => 3,
??? 3 => 34,
??? 4 => 5,
??? 5 => 6,
??? 6 => 6,
? ),
? 'expire' => 0,
? 'mtime' => 1318224645,
)
?>
?*
?*
?*/
cache::setCacheMode('2');
if(!$row = cache::get('zj2'))
{
?
?$array = array(1,2,3,34,5,6,6);
?$row = cache::set('zj2',$array);
}
// cache::flush(); 清空所有缓存
print_r($row);

<?php
/**
?* 文件缓存类
?* @date 2011-08-17
?*/
class cache
{
?const FILE_LIFE_KEY = 'FILE_LIFE_KEY';
?
?const CLEAR_ALL_KEY = 'CLEAR_ALL';
?
??? static $_instance = null;
?
??? protected $_options = array(
??????? 'cache_dir' => './cache',
??????? 'file_locking' => true,
??????? 'cache_file_umask' => 0777,
???? 'file_life'? => 100000
??? );
???
??? static function &getInstance($options = array())
??? {
???? if(self::$_instance === null)
???? {
????? self::$_instance = new self($options);
???? }
???? return self::$_instance;
??? }
???
??? /**
???? * 设置参数
???? * @param? array $options 缓存参数
???? * @return void
???? */
?static function &setOptions($options = array())
?{
???????? return self::getInstance($options);
?}
?
??? /**
???? * 构造函数
???? * @param? array $options 缓存参数
???? * @return void
???? */
??? private function __construct($options = array())
??? {?
??????? if ($this->_options['cache_dir'] !== null) {
??
?? $dir = rtrim($this->_options['cache_dir'],'/') . '/';
???????? $this->_options['cache_dir'] = $dir;
????????
?? if (!is_dir($this->_options['cache_dir'])) {
???????????? mkdir($this->_options['cache_dir'],0777,TRUE);
???????? }
???????? if (!is_writable($this->_options['cache_dir'])) {
???????????? exit('file_cache: 路径 "'. $this->_options['cache_dir'] .'" 不可写');
???????? }
?????
??????? } else {
?????????? exit('file_cache: "options" cache_dir 不能为空 ');
??????? }
??? }
??? /**
???? * 设置缓存路径
???? * @param? string? $value
???? * @return void
???? */
??? static function setCacheDir($value)
??? {
???? $self = & self::getInstance();
????
??????? if (!is_dir($value)) {
??????????? exit('file_cache: ' . $value.' 不是一个有效路径 ');
??????? }
??????? if (!is_writable($value)) {
??????????? exit('file_cache: 路径 "'.$value.'" 不可写');
??????? }
???
??????? $value = rtrim($this->_options['cache_dir'],'/') . '/';
???????
??????? $self->_options['cache_dir'] = $value;
??? }
???
??? /**
???? * 存入缓存数据
???? * @param? array? $data????????? 放入缓存的数据
???? * @param? string $id??????????? 缓存id(又名缓存识别码)
???? * @param? cache_life??????????? 缓存时间
???? * @return boolean True if no problem
???? */
??? static function save($data,$id = null,$cache_life = null)
??? {
???? $self = & self::getInstance();
??????? if (!$id) {
??????????? if ($self->_id) {
??????????????? $id = $self->_id;
??????????? } else {
??????????????? exit('file_cache:save() id 不能为空!');
??????????? }
??????? }
??????? $time = time();
???????
??????? if($cache_life) {
???????? $data[self::FILE_LIFE_KEY] = $time + $cache_life;
??????? }
? elseif
? ($cache_life != 0){
???????? $data[self::FILE_LIFE_KEY] = $time + $self->_options['file_life'];
??????? }
???????
??????? $file = $self->_file($id);
???????
??????? $data = "<?phpn".
??????????????? " // mktime: ". $time. "n".
??????????????? " return ".
??????????????? var_export($data,true).
??????????????? "n?>"
??????????????? ;
???????
??????? $res = $self->_filePutContents($file,$data);
??????? return $res;
??? }
???
???
??? /**
???? * 得到缓存信息
???? *
???? * @param? string? $id? 缓存id
???? * @return string|array 缓存数据
???? */
??? static function load($id)
??? {
??????? $self = & self::getInstance();
???? $time = time();
???? //检测缓存是否存在
???? if (!$self->test($id)) {
??????????? // The cache is not hit !
??????????? return false;
??????? }
???????
? //全部清空识别文件
??????? $clearFile = $self->_file(self::CLEAR_ALL_KEY);
?
? $file = $self->_file($id);
?
??????? //判断缓存是否已被全部清除
???? if(is_file($clearFile) && filemtime($clearFile) > filemtime($file))
???? {
????? return false;
???? }
??????
??????? $data = $self->_fileGetContents($file);
????? if(empty($data[self::FILE_LIFE_KEY]) || $time < $data[self::FILE_LIFE_KEY]) {
??????????? unset($data[self::FILE_LIFE_KEY]);
?????? return $data;??
????? }
????? return false;
??? }???
???
??? /**
???? * 写入缓存文件
???? *
???? * @param? string $file?? 缓存路径
???? * @param? string $string 缓存信息
???? * @return boolean true 成功
???? */
??? protected function _filePutContents($file,$string)
??? {
???? $self = & self::getInstance();
??????? $result = false;
??????? $f = @fopen($file,'ab+');
??????? if ($f) {
??????????? if ($self->_options['file_locking']) @flock($f,$string);
??????????? if (!($tmp === false)) {
??????????????? $result = true;
??????????? }
??????????? @fclose($f);
??????? }
??????? @chmod($file,$self->_options['cache_file_umask']);
??????? return $result;
??? }
???
??? /**
???? * 格式化后的缓存文件路径
???? *
???? * @param? string $id 缓存id
???? * @return string 缓存文件名(包括路径)
???? */
??? protected function _file($id)
??? {
???? $self = & self::getInstance();
??????? $fileName = $self->_idToFileName($id);
??????? return $self->_options['cache_dir'] . $fileName;
??? }???
???
??? /**
???? * 格式化后的缓存文件名字
???? *
???? * @param? string $id 缓存id
???? * @return string 缓存文件名
???? */
??? protected function _idToFileName($id)
??? {
???? $self = & self::getInstance();
??????? $self->_id = $id;
??????? $prefix = $self->_options['file_name_prefix'];
??????? $result = $prefix . '---' . $id;
??????? return $result;
??? }??
???
??? /**
???? * 判断缓存是否存在
???? *
???? * @param? string $id Cache id
???? * @return boolean True 缓存存在 False 缓存不存在
???? */
??? static function test($id)
??? {
???? $self = & self::getInstance();
??????? $file = $self->_file($id);
???????
??????? if (!is_file($file)) {
??????????? return false;
??????? }
???????
??????? return true;
??? }
???
??? /**
???? * 得到缓存信息
???? *
???? * @param? string $file 缓存路径
???? * @return string 缓存内容
???? */
??? protected function _fileGetContents($file)
??? {
??????? if (!is_file($file)) {
??????????? return false;
??????? }
??????? return include $file;
??? }????
???
??? /**
???? * 清除所有缓存
???? *
???? * @return void
???? */???
??? static function clear()
??? {
???? $self = & self::getInstance();
???? $self->save('CLEAR_ALL',self::CLEAR_ALL_KEY);
??? }??
?
??? /**
???? * 清除一条缓存
???? *
???? * @param string cache id?
???? * @return void
???? */??
??? static function del($id)
??? {
? $self = & self::getInstance();
???? if(!$self->test($id)){
????? // 该缓存不存在
????? return false;
???? }
???? $file = $self->_file($id);
???? return unlink($file);
??? }
}

<?php
$config = array(
?'name' => 'xiaojiong',
?'qq'?? => '290747680',
?'age'? => '20',
);
//第一个参数 缓存data
//第二个参数 缓存id
//第三个参数 cache_life 0 永不过期(cache::clear()清空所有除外) 默认cache_life 为option_cache_life
cache::save($config,'config',0);

<?php
//只有一个参数 cache_id
$config = cache::load('config');
清空缓存
<?php
//清空指定缓存
cache::del('config');
//清空所有缓存
cache::clear();
cache信息配置
//在执行所有cache_func前调用
$_options = array(
??? 'cache_dir' => './cache',//缓存文件目录
??? 'file_name_prefix' => 'cache',//缓存文件前缀
??? 'file_life'? => 100000,//缓存文件生命
);
cache::setOptions($options);
//再执行 就会按着新配置信息执行,否则是默认信息
cache::save($arr,'arr');