How does PHP operate Memcache cache?
After installing memcache service and php extension, we can use php to operate memcache to implement caching!
Summary of all methods of PHP's Memcache client
The list of all methods of the memcache class is as follows:
Memcache::add – 添加一个值,如果已经存在,则返回false Memcache::addServer – 添加一个可供使用的服务器地址 Memcache::close – 关闭一个Memcache对象 Memcache::connect – 创建一个Memcache对象 memcache_debug – 控制调试功能 Memcache::decrement – 对保存的某个key中的值进行减法操作 Memcache::delete – 删除一个key值 Memcache::flush – 清除所有缓存的数据 Memcache::get – 获取一个key值 不存在则返回false Memcache::getExtendedStats – 获取进程池中所有进程的运行系统统计 Memcache::getServerStatus – 获取运行服务器的参数 Memcache::getStats – 返回服务器的一些运行统计信息 Memcache::getVersion – 返回运行的Memcache的版本信息 Memcache::increment – 对保存的某个key中的值进行加法操作 Memcache::pconnect – 创建一个Memcache的持久连接对象 Memcache::replace -对一个已有的key进行覆写操作 Memcache::set – 添加一个值,如果已经存在,则覆写 Memcache::setCompressThreshold – 对大于某一大小的数据进行压缩 Memcache::setServerParams – 在运行时修改服务器的参数
Read and set the cache code Example
<?php //实例化 memcache 对象 $memObj = new Memcache(); //连接memcache服务器 参数 地址,端口(memcache的默认端口为 11211) $memObj->connect('127.0.0.1', 11211); //获取某个变量的值 如果存在在返回变量的值 否则返回false $var = $memObj->get('test'); //判断缓存是否存在,不存在则连接数据库获取变量并保存到memcache服务器 if(!$var){ //连接数据库... 此处省略 例如返回值为 'test....'; $var = 'test....'; $memObj->set('test', $var); //测试缓存过程输出个提示 echo '缓存不存在.....'; } echo $var;
Delete cache
<?php //实例化 memcache 对象 $memObj = new Memcache(); //连接memcache服务器 参数 地址,端口(memcache的默认端口为 11211) $memObj->connect('127.0.0.1', 11211); //删除缓存 $memObj->delete('test');
Clear cache
<?php //实例化 memcache 对象 $memObj = new Memcache(); //连接memcache服务器 参数 地址,端口(memcache的默认端口为 11211) $memObj->connect('127.0.0.1', 11211); $memObj->flush();
Close connection
<?php //实例化 memcache 对象 $memObj = new Memcache(); //连接memcache服务器 参数 地址,端口(memcache的默认端口为 11211) $memObj->connect('127.0.0.1', 11211); $memObj->flush(); $memObj->close();
After combined with PHP, the value of memcache can be common PHP variables such as ordinary variables, arrays, objects, etc.
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