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111 lines
3.5 KiB
PHP
111 lines
3.5 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkCache
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Cache\Driver;
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/**
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* Memcache缓存驱动
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* @author liu21st <liu21st@gmail.com>
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*/
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class Memcache {
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protected $handler = null;
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protected $options = [
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'host' => '127.0.0.1',
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'port' => 11211,
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'expire' => 0,
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'timeout' => false,
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'persistent' => false,
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'length' => 0,
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];
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/**
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* 架构函数
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* @param array $options 缓存参数
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* @access public
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*/
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public function __construct($options=[]) {
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if ( !extension_loaded('memcache') ) {
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E('_NOT_SUPPERT_:memcache');
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}
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if(!empty($options)) {
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$this->options = array_merge($this->options,$options);
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}
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$func = $this->options['persistent'] ? 'pconnect' : 'connect';
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$this->handler = new \Memcache;
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$options['timeout'] === false ?
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$this->handler->$func($options['host'], $options['port']) :
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$this->handler->$func($options['host'], $options['port'], $options['timeout']);
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}
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/**
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* 读取缓存
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* @access public
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* @param string $name 缓存变量名
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* @return mixed
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*/
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public function get($name) {
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return $this->handler->get($this->options['prefix'].$name);
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}
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/**
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* 写入缓存
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* @access public
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* @param string $name 缓存变量名
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* @param mixed $value 存储数据
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* @param integer $expire 有效时间（秒）
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* @return boolen
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*/
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public function set($name, $value, $expire = null) {
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if(is_null($expire)) {
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$expire = $this->options['expire'];
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}
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$name = $this->options['prefix'].$name;
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if($this->handler->set($name, $value, 0, $expire)) {
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if($this->options['length']>0) {
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// 记录缓存队列
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$queue = $this->handler->get('__info__');
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if(!$queue) {
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$queue = [];
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}
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if(false===array_search($name, $queue)) array_push($queue,$name);
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if(count($queue) > $this->options['length']) {
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// 出列
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$key = array_shift($queue);
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// 删除缓存
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$this->handler->delete($key);
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}
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$this->handler->set('__info__', $queue);
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}
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return true;
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}
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return false;
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}
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/**
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* 删除缓存
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* @access public
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* @param string $name 缓存变量名
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* @return boolen
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*/
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public function rm($name, $ttl = false) {
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$name = $this->options['prefix'].$name;
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return $ttl === false ?
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$this->handler->delete($name) :
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$this->handler->delete($name, $ttl);
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}
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/**
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* 清除缓存
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* @access public
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* @return boolen
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*/
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public function clear() {
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return $this->handler->flush();
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}
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} |