可以修改php.ini文件的情况下:
1、修改php.ini中的
复制代码 代码如下:
session.save_hander = memcache;
session.save_path = "tcp://host:端口号";//例如:session.save_path = "tcp://127.0.0.1:11211";
2、正常存取session的值就OK了。
不可以修改php.ini文件的情况下:
a、动态修改php.ini中的设置。
复制代码 代码如下:
ini_set('session.save_hander', 'memcache');
ini_set('session.save_path', 'tcp://127.0.0.1:11211');
说明:ini_set()只对当前php页面有效,并且不会去修改php.ini文件本身,也不会影响其他php页面。
b、正常存取session的值就OK了。
Memcache和Session的比较
memcache的主要目的是缓解数据库压力并提速,因此它是一种无状态的数据(无状态数据:当前数据并不和某个用户绑定,比如:Lee存的数据,Richard可以取出来,只要知道对应的key值就可以)
session数据是和用户绑定的,因此是一种有状态的数据。
Memcache的安全性
将memcache放入内网中,用防火墙去阻止外部访问
适合存入Memcached中的数据
变化频繁的,具有不稳定性的,不需要实时入库的,安全性较低的

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