Home Backend Development PHP Tutorial Basic method of operating memcache cache in php

Basic method of operating memcache cache in php

Nov 29, 2016 am 10:31 AM
php

<?php
/**
 * Memcache<a href="http://www.php1.cn/category/79.html">缓存</a>操作
 * @update http://www.lai18.com
 */
class MCache extends Object implements CacheFace
{
  private $mem = null; //Mem对象
     
  private $sId = 1;  //servier服务ID
     
  /**
   * 初始化Memcache
   *
   * @return Object
   */
  public function __construct()
  {
    if ( !class_exists(&#39;Memcache&#39;) )
    {
      throw new QException(&#39;PHP extension does not exist: Memcache&#39;);
    }
    $this->mem = new Memcache();
  }
     
  /**
   * 链接memcahce服务
   *
   * @access private
   * @param  string $key 关键字
   * @param  string $value <a href="http://www.php1.cn/category/79.html">缓存</a>内容
   * @return array
   * @update http://www.lai18.com
   */
  private function connect( $sid )
  {
    $file = $this->CacheFile();
    require $file;
    if(! isset($cache) )
    {
      throw new QException(&#39;<a href="http://www.php1.cn/category/79.html">缓存</a>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<a href="http://www.php1.cn/category/79.html">缓存</a>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->mem->connect( $host , $port );
    } catch (Exception $e) {
      exit(&#39;memecache连接失败,错误信息:&#39;. $e->getMessage());
    }
  }
     
  /**
   * 写入<a href="http://www.php1.cn/category/79.html">缓存</a>
   *
   * @access private
   * @param  string $key 关键字
   * @param  string $value <a href="http://www.php1.cn/category/79.html">缓存</a>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->mem->set( $key , $value ,MEMCACHE_COMPRESSED , $expire);
    } else {
      return $this->mem->add( $key , $value ,MEMCACHE_COMPRESSED , $expire);
    }
  }
     
  /**
   * 读取<a href="http://www.php1.cn/category/79.html">缓存</a>
   *
   * @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 $this->mem->get($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->mem->flush();
  }
  /**
   * 删除<a href="http://www.php1.cn/category/79.html">缓存</a>
   *
   * @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 $this->mem->delete($key);
  }
     
  /**
   * 析构函数
   * 最后关闭memcache
   */
  public function __destruct()
  {
    /*if(! $this->mem)
    {
      $this->mem->close();
    }*/
  }
}
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