128 lines
3.3 KiB
PHP
128 lines
3.3 KiB
PHP
<?php
|
||
// +----------------------------------------------------------------------
|
||
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
|
||
// +----------------------------------------------------------------------
|
||
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
|
||
// +----------------------------------------------------------------------
|
||
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
|
||
// +----------------------------------------------------------------------
|
||
// | Author: liu21st <liu21st@gmail.com>
|
||
// +----------------------------------------------------------------------
|
||
|
||
namespace think\cache\driver;
|
||
|
||
use think\Cache;
|
||
|
||
/**
|
||
* 文件类型缓存类
|
||
* @author liu21st <liu21st@gmail.com>
|
||
*/
|
||
class Lite
|
||
{
|
||
protected $options = [
|
||
'prefix' => '',
|
||
'path' => '',
|
||
'expire' => 0, // 等于 10*365*24*3600（10年）
|
||
];
|
||
|
||
/**
|
||
* 架构函数
|
||
* @access public
|
||
*
|
||
* @param array $options
|
||
*/
|
||
public function __construct($options = [])
|
||
{
|
||
if (!empty($options)) {
|
||
$this->options = array_merge($this->options, $options);
|
||
}
|
||
if (substr($this->options['path'], -1) != DS) {
|
||
$this->options['path'] .= DS;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* 取得变量的存储文件名
|
||
* @access private
|
||
* @param string $name 缓存变量名
|
||
* @return string
|
||
*/
|
||
private function filename($name)
|
||
{
|
||
return $this->options['path'] . $this->options['prefix'] . md5($name) . '.php';
|
||
}
|
||
|
||
/**
|
||
* 读取缓存
|
||
* @access public
|
||
* @param string $name 缓存变量名
|
||
* @return mixed
|
||
*/
|
||
public function get($name)
|
||
{
|
||
$filename = $this->filename($name);
|
||
if (is_file($filename)) {
|
||
// 判断是否过期
|
||
$mtime = filemtime($filename);
|
||
if ($mtime < $_SERVER['REQUEST_TIME']) {
|
||
// 清除已经过期的文件
|
||
unlink($filename);
|
||
return false;
|
||
}
|
||
return include $filename;
|
||
} else {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 写入缓存
|
||
* @access public
|
||
* @param string $name 缓存变量名
|
||
* @param mixed $value 存储数据
|
||
* @param int $expire 有效时间 0为永久
|
||
* @return bool
|
||
*/
|
||
public function set($name, $value, $expire = null)
|
||
{
|
||
if (is_null($expire)) {
|
||
$expire = $this->options['expire'];
|
||
}
|
||
// 模拟永久
|
||
if (0 === $expire) {
|
||
$expire = 10 * 365 * 24 * 3600;
|
||
}
|
||
$filename = $this->filename($name);
|
||
$ret = file_put_contents($filename, ("<?php return " . var_export($value, true) . ";"));
|
||
// 通过设置修改时间实现有效期
|
||
if ($ret) {
|
||
touch($filename, $_SERVER['REQUEST_TIME'] + $expire);
|
||
}
|
||
return $ret;
|
||
}
|
||
|
||
/**
|
||
* 删除缓存
|
||
* @access public
|
||
* @param string $name 缓存变量名
|
||
* @return boolean
|
||
*/
|
||
public function rm($name)
|
||
{
|
||
return unlink($this->filename($name));
|
||
}
|
||
|
||
/**
|
||
* 清除缓存
|
||
* @access public
|
||
* @return bool
|
||
* @internal param string $name 缓存变量名
|
||
*/
|
||
public function clear()
|
||
{
|
||
$filename = $this->filename('*');
|
||
array_map("unlink", glob($filename));
|
||
}
|
||
}
|