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php如何实现redis的缓存(附代码)

Jun 06, 2016 pm 08:08 PM
php redis cache

除了memcache这个比较常用的php的操作类库,我们可能还非常熟悉一个内存缓存的东西,那就是redis,我们给大家分享的这个php技术文章,就是关于如何使用php进行操作redis这个内存缓存工具类库的哦。

php redis缓存操作

<?php
/**
 * Redis缓存操作
 * @author hxm
 * @version 1.0
 * @since 2015.05.04
 */
class RCache extends Object implements CacheFace 
{
  private $redis = null; //redis对象 
  private $sId  = 1;  //servier服务ID 
  private $con  = null;//链接资源   
  /**
   * 初始化Redis
   *
   * @return Object
   */
  public function __construct()
  {
    if ( !class_exists(&#39;Redis&#39;) )
    {
      throw new QException(&#39;PHP extension does not exist: Redis&#39;);
    }
    $this->redis = new Redis();
  }
   
  /**
   * 链接memcahce服务
   *
   * @access private
   * @param  string $key 关键字
   * @param  string $value 缓存内容
   * @return array
   */
  private function connect( $sid )
  {
    $file = $this->CacheFile();
    require $file;
    if(! isset($cache) )
    {
      throw new QException(&#39;缓存配置文件不存在&#39;.$file);
    }
    $server = $cache[$this->cacheId];
    $sid  = isset($sid) == 0 ? $this->sId : $sid;//memcache服务选择
    if ( ! $server[$sid])
    {
      throw new QException(&#39;当前操作的缓存服务器配置文件不存在&#39;);
    }
    $host = $server[$sid][&#39;host&#39;];
    $port = $server[$sid][&#39;port&#39;];
    try {
      $this->redis->connect( $host , $port );
    } catch (Exception $e) {
      exit(&#39;memecache连接失败,错误信息:&#39;. $e->getMessage());
    }
  }
   
  /**
   * 写入缓存
   *
   * @access private
   * @param  string $key 关键字
   * @param  string $value 缓存内容
   * @return array
   */
  public function set( $key , $value , $sid , $expire = 0)
  {
    $data = $this->get($key , $sid); //如果已经存在key值
    if( $data ) 
    {
      return $this->redis->getset( $key , $value);
    } else {
      return $this->redis->set( $key , $value);
    }
  }
   
  /**
   * 读取缓存
   *
   * @access private
   * @param  string $key 关键字
   * @param  int   $sid 选择第几台memcache服务器
   * @return array
   */
  public function get( $key , $sid)
  {
    $this->connect( $sid );
    return $this->redis->get($key);
  }
   
  /**
   * 清洗(删除)已经存储的所有的元素
   *
   * @access private
   * @return array
   */
  public function flush()
  {
    $this->connect();
    return $this->redis->flushall();
  }
  /**
   * 删除缓存
   *
   * @access private
   * @param  string $key 关键字
   * @param  int   $sid 选择第几台memcache服务器
   * @return array
   */
  public function remove( $key , $sid)
  {
    $this->connect();
    return $this->redis->del($key);
  }
   
  /**
   * 析构函数
   * 最后关闭memcache
   */
  public function __destruct()
  {
    if($this->redis)
    {
      $this->redis->close();
    }
  }
}
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以上所述就是本文的全部内容了,希望大家能够喜欢。

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