PHP学习：利用php操作memcache缓存的基础方法示例

<?php 
 
 //连接 
 $mem = new Memcache; 
 $mem->connect("127.0.0.1", 11211) or die ("Could not connect"); 
 //显示版本 
 $version = $mem->getVersion(); 
 echo "Memcached Server version: ".$version."<br>"; 
 //保存数据 
 $mem->set('key1', 'This is first value', 0, 60); 
 $val = $mem->get('key1'); 
 echo "Get key1 value: " . $val ."<br>"; 
 //替换数据 
 $mem->replace('key1', 'This is replace value', 0, 60); 
 $val = $mem->get('key1'); 
 echo "Get key1 value: " . $val . "<br>"; 
 //保存数组 
 $arr = array('aaa', 'bbb', 'ccc', 'ddd'); 
 $mem->set('key2', $arr, 0, 60); 
 $val2 = $mem->get('key2'); 
 echo "Get key2 value: "; 
 print_r($val2); 
 echo "<br>"; 
 
 //对数组进行序列化,在网络传输的时候,为了保证,数据类型的不丢失,先序列化,再发生. 
 //$arr1=serialize($arr); 
 $arr2=json_encode($arr1); 
 print_r($arr2); 
 
 //删除数据 
 $mem->delete('key1'); 
 $val = $mem->get('key1'); 
 echo "Get key1 value: " . $val . "<br>"; 
 //清除所有数据 
 $mem->flush(); 
 $val2 = $mem->get('key2'); 
 echo "Get key2 value: "; 
 print_r($val2); 
 echo "<br>"; 
 //关闭连接 
 $mem->close(); 
 
?> 

<?php 
 
 //1.实例化一个Memcache对象 
 $mem=new Memcache(); 
 
 //2. 连接到指定的memcache中 
 // $mem->connect("127.0.0.1",11211); 
 
 //如果我们网站,需要多个memached缓存系统,如下使用分布式 
 $mem->addServer("192.168.1.100",11211); 
 $mem->addServer("192.168.1.200",11211); 
 $mem->addServer("192.168.1.222",11211); 
 
 //创建多个memcache服务使用addServer 会根据负载均衡算法,自动放入每个服务器 
 $mem->add("name","zs",0,100); 
 
?>