153 lines
4.4 KiB
PHP
153 lines
4.4 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 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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use think\Exception;
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class Memcache
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{
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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' => 0, // 超时时间（单位：毫秒）
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'persistent' => true,
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'prefix' => '',
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];
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/**
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* 架构函数
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* @param array $options 缓存参数
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* @access public
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* @throws \BadFunctionCallException
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*/
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public function __construct($options = [])
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{
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if (!extension_loaded('memcache')) {
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throw new \BadFunctionCallException('not support: memcache');
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}
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if (!empty($options)) {
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$this->options = array_merge($this->options, $options);
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}
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$this->handler = new \Memcache;
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// 支持集群
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$hosts = explode(',', $this->options['host']);
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$ports = explode(',', $this->options['port']);
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if (empty($ports[0])) {
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$ports[0] = 11211;
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}
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// 建立连接
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foreach ((array) $hosts as $i => $host) {
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$port = isset($ports[$i]) ? $ports[$i] : $ports[0];
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$this->options['timeout'] > 0 ?
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$this->handler->addServer($host, $port, $this->options['persistent'], 1, $this->options['timeout']) :
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$this->handler->addServer($host, $port, $this->options['persistent'], 1);
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}
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}
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/**
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* 判断缓存
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* @access public
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* @param string $name 缓存变量名
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* @return bool
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*/
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public function has($name)
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{
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$name = $this->options['prefix'] . $name;
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return $this->handler->get($name) ? true : false;
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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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* @param mixed $default 默认值
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* @return mixed
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*/
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public function get($name, $default = false)
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{
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$result = $this->handler->get($this->options['prefix'] . $name);
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return false !== $result ? $result : $default;
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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 $expire 有效时间（秒）
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* @return bool
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*/
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public function set($name, $value, $expire = null)
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{
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if (is_null($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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return true;
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}
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return false;
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}
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/**
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* 自增缓存（针对数值缓存）
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* @access public
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* @param string $name 缓存变量名
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* @param int $step 步长
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* @param int $expire 有效时间 0为永久
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* @return false|int
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*/
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public function inc($name, $step = 1, $expire = null)
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{
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return $this->handler->increment($name, $step);
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}
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/**
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* 自减缓存（针对数值缓存）
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* @access public
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* @param string $name 缓存变量名
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* @param int $step 步长
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* @param int $expire 有效时间 0为永久
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* @return false|int
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*/
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public function dec($name, $step = 1, $expire = null)
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{
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return $this->handler->decrement($name, $step);
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}
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/**
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* 删除缓存
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* @param string $name 缓存变量名
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* @param bool|false $ttl
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* @return bool
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*/
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public function rm($name, $ttl = false)
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{
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$name = $this->options['prefix'] . $name;
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return false === $ttl ?
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$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 bool
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*/
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public function clear()
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{
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return $this->handler->flush();
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}
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}
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