You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

189 lines
5.4 KiB

This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 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\Driver;
/**
* Redis缓存驱动适合单机部署、有前端代理实现高可用的场景性能最好
* 有需要在业务层实现读写分离、或者使用RedisCluster的需求请使用Redisd驱动
*
* 要求安装phpredis扩展https://github.com/nicolasff/phpredis
* @author 尘缘 <130775@qq.com>
*/
class Redis extends Driver
{
protected $options = [
'host' => '127.0.0.1',
'port' => 6379,
'password' => '',
'select' => 0,
'timeout' => 0,
'expire' => 0,
'persistent' => false,
'prefix' => '',
];
/**
* 构造函数
* @param array $options 缓存参数
* @access public
*/
public function __construct($options = [])
{
if (!extension_loaded('redis')) {
throw new \BadFunctionCallException('not support: redis');
}
if (!empty($options)) {
$this->options = array_merge($this->options, $options);
}
$this->handler = new \Redis;
if ($this->options['persistent']) {
$this->handler->pconnect($this->options['host'], $this->options['port'], $this->options['timeout'], 'persistent_id_' . $this->options['select']);
} else {
$this->handler->connect($this->options['host'], $this->options['port'], $this->options['timeout']);
}
if ('' != $this->options['password']) {
$this->handler->auth($this->options['password']);
}
if (0 != $this->options['select']) {
$this->handler->select($this->options['select']);
}
}
/**
* 判断缓存
* @access public
* @param string $name 缓存变量名
* @return bool
*/
public function has($name)
{
return $this->handler->exists($this->getCacheKey($name));
}
/**
* 读取缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $default 默认值
* @return mixed
*/
public function get($name, $default = false)
{
$value = $this->handler->get($this->getCacheKey($name));
if (is_null($value) || false === $value) {
return $default;
}
try {
$result = 0 === strpos($value, 'think_serialize:') ? unserialize(substr($value, 16)) : $value;
} catch (\Exception $e) {
$result = $default;
}
return $result;
}
/**
* 写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param integer|\DateTime $expire 有效时间(秒)
* @return boolean
*/
public function set($name, $value, $expire = null)
{
if (is_null($expire)) {
$expire = $this->options['expire'];
}
if ($expire instanceof \DateTime) {
$expire = $expire->getTimestamp() - time();
}
if ($this->tag && !$this->has($name)) {
$first = true;
}
$key = $this->getCacheKey($name);
$value = is_scalar($value) ? $value : 'think_serialize:' . serialize($value);
if ($expire) {
$result = $this->handler->setex($key, $expire, $value);
} else {
$result = $this->handler->set($key, $value);
}
isset($first) && $this->setTagItem($key);
return $result;
}
/**
* 自增缓存(针对数值缓存)
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
public function inc($name, $step = 1)
{
$key = $this->getCacheKey($name);
return $this->handler->incrby($key, $step);
}
/**
* 自减缓存(针对数值缓存)
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
public function dec($name, $step = 1)
{
$key = $this->getCacheKey($name);
return $this->handler->decrby($key, $step);
}
/**
* 删除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
public function rm($name)
{
return $this->handler->delete($this->getCacheKey($name));
}
/**
* 清除缓存
* @access public
* @param string $tag 标签名
* @return boolean
*/
public function clear($tag = null)
{
if ($tag) {
// 指定标签清除
$keys = $this->getTagItem($tag);
foreach ($keys as $key) {
$this->handler->delete($key);
}
$this->rm('tag_' . md5($tag));
return true;
}
return $this->handler->flushDB();
}
}