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PHP中Memcache操作类及用法实例

Jun 06, 2016 pm 08:15 PM
memcache php usage

这篇文章主要介绍了PHP中Memcache操作类及用法,以实例形式详细分析了Memcache类连接数据库及进行缓存操作的具体用法,非常具有实用价值,需要的朋友可以参考下

本文实例讲述了PHP中Memcache操作类及用法。分享给大家供大家参考。具体分析如下:

复制代码 代码如下:


    /*  内存缓存管理 
    */
class Yc_Memcache{ 
 private $memcache=null;  
  
 public function __construct(){ 
 } 
 /** 
    * 连接数据库 
    * 
    * @param mixed $host 
    * @param mixed $port 
    * @param mixed $timeout 
    */
 public  function connect($host,$port=11211,$timeout=1){ 
  if(!function_exists(memcache_connect)){ return FALSE;} 
  $this->memcache=@memcache_connect($host,$port,$timeout); 
  if(emptyempty($this->memcache)){ 
   return FALSE; 
  }else{ 
   return TRUE; 
  } 
 } 
    /** 
    * 存放值 
    * 
    * @param mixed $key 
    * @param mixed $var 
    * @param mixed $flag   默认为0不压缩  压缩状态填写:MEMCACHE_COMPRESSED 
    * @param mixed $expire  默认缓存时间(单位秒) 
    */
 public function set($key,$var,$flag=0,$expire=10){ 
  
  $f=@memcache_set($this->memcache,$key,$var,$flag,$expire); 
  if(emptyempty($f)){ 
   return FALSE; 
  }else{ 
   return TRUE; 
  } 
 } 
    /** 
    * 取出对应的key的value 
    * 
    * @param mixed $key 
    * @param mixed $flags 
    * $flags 如果此值为1表示经过序列化, 
    * 但未经过压缩,2表明压缩而未序列化, 
    * 3表明压缩并且序列化,,0表明未经过压缩和序列化 
    */
 public function get($key,$flags=0){ 
  $val=@memcache_get($this->memcache,$key,$flags); 
  return $val; 
 } 
 /** 
    * 删除缓存的key 
    * 
    * @param mixed $key 
    * @param mixed $timeout 
    */
 public function delete($key,$timeout=1){ 
  $flag=@memcache_delete($this->memcache,$key,$timeout); 
  return $flag; 
 } 
    /** 
    * 刷新缓存但不释放内存空间 
    * 
    */
 public function flush(){ 
  memcache_flush($this->memcache); 
 } 
    /** 
    * 关闭内存连接 
    * 
    */
 public function close(){ 
  memcache_close($this->memcache); 
 } 
    /** 
    * 替换对应key的value 
    * 
    * @param mixed $key 
    * @param mixed $var 
    * @param mixed $flag 
    * @param mixed $expire 
    */
 public function replace($key,$var,$flag=0,$expire=1){ 
  $f=memcache_replace($this->memcache,$key,$var,$flag,$expire); 
  return $f; 
 } 
    /** 
    * 开启大值自动压缩 
    * 
    * @param mixed $threshold 单位b 
    * @param mixed $min_saveings 默认值是0.2表示20%压缩率 
    */
 public function setCompressThreshold($threshold,$min_saveings=0.2){ 
  $f=@memcache_set_compress_threshold($this->memcache,$threshold,$min_saveings); 
  return $f; 
 } 
    /** 
    * 用于获取一个服务器的在线/离线状态 
    * 
    * @param mixed $host 
    * @param mixed $port 
    */
 public function getServerStatus($host,$port=11211){ 
  $re=memcache_get_server_status($this->memcache,$host,$port); 
  return $re; 
 } 
    /** 
    * 缓存服务器池中所有服务器统计信息 
    * 
    * @param mixed $type 期望抓取的统计信息类型,可以使用的值有{reset, malloc, maps, cachedump, slabs, items, sizes} 
    * @param mixed $slabid  cachedump命令会完全占用服务器通常用于 比较严格的调 
    * @param mixed $limit 从服务端获取的实体条数 
    */
 public function getExtendedStats($type='',$slabid=0,$limit=100){ 
  $re=memcache_get_extended_stats($this->memcache,$type,$slabid,$limit);
  return $re; 
 } 

  
/***********测试区域********************/
$mem=new Yc_Memcache(); 
  
$f=$mem->connect('125.64.41.138',12000); 
var_dump($f); 
if($f){ 
// $mem->setCompressThreshold(2000,0.2); 
 $mem->set('key','hello',0,30); 
//        var_dump($mem->delete('key1')); 
 // $mem->flush(); 
// var_dump($mem->replace('hao','d')); 
// echo $mem->get('key'); 
 echo $mem->getServerStatus('127.0.0.1',12000); 
 echo $mem->get('key'); 
 echo '

';  <br>
 print_r($mem->getExtendedStats());  <br>
}  <br>
   <br>
?><br>

<p>希望本文所述对大家的PHP程序设计有所帮助。</p>



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