PHP缓存应用：PHP MEMCACHE 详解_PHP

memcacheEMC

Memcache函数库是在PECL(PHP Extension Community Library)中，主要作用是搭建大容量的内存数据的临时存放区域，在分布式的时候作用体现的非常明显，否则不建议使用。在ubuntu上安装完运行的时候报错：

/usr/local/memcached/bin/memcached: error while loading shared libraries: libevent-1.4.so.2:

cannot open shared object file: No such file or directory

按照：《libeven、memcached、libmemcache安装》中的方法，使用：

sudo ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib/libevent-1.4.so.2

可以修正这个BUG

通过新得立安装php的memcached模块，注销/etc/php5/conf.d/memcached.ini里面的“;”，重启apache，调用phpinfo()出现memcached的信息。

$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die ("Could not connect");
$version = $memcache->getVersion();
echo "Server's version: ".$version."\n";
?>

2. $memcache = new Memcache;
3. $memcache->connect('localhost', 11211) or die ("Could not connect");
4. print_r($memcache->getStats());
5. /**
6. * Array
7. * (
8. * [pid] => 8052
9. * [uptime] => 9205
10. * [time] => 1205898428
11. * [version] => 1.2.5
12. * [pointer_size] => 32
13. * [rusage_user] => 0.008000
14. * [rusage_system] => 0.000000
15. * [curr_items] => 1
16. * [total_items] => 17
17. * [bytes] => 57
18. * [curr_connections] => 2
19. * [total_connections] => 15
20. * [connection_structures] => 3
21. * [cmd_get] => 9
22. * [cmd_set] => 23
23. * [get_hits] => 5
24. * [get_misses] => 4
25. * [evictions] => 0
26. * [bytes_read] => 671
27. * [bytes_written] => 850
28. * [limit_maxbytes] => 10485760
29. * [threads] => 1
30. * )
31. */
32. ?>

01.02.$memcache = new Memcache;
03.$memcache->connect('localhost', 11211) or die ("Could not connect");
04.$memcache->set( 'name', 'leo', 0, 30);
05.if(!$memcache->add( 'name', 'susan', 0, 30))
06.{
07. echo 'susan is exist';
08.};
09.$memcache->replace( 'name', 'lion', 0, 300);
10.echo $memcache->get( 'name');
11.$memcache->delete( 'name', 5);
12.?>

01.02.function _callback_memcache_failure($host, $port) {
03. print "memcache '$host:$port' failed";
04.}
05.$memcache = new Memcache;
06.$memcache->addServer('192.168.1.116', 11211);
07.$memcache->setServerParams('192.168.1.116', 11211, 1, 15, true,
08.
09.'_callback_memcache_failure');
10.echo $memcache->getServerStatus('192.168.1.116', 11211);
11.?>

01.02.$memcache = new Memcache;
03.$memcache->connect('localhost', 11211);
04.$memcache->set('test_item', 8);
05.$memcache->increment('test_item', 4);
06.echo $memcache->decrement('test_item', 7);
07.// 显示 5
08.?>

/usr/local/bin/memcached -d -m 10 -u root -l 127.0.0.1 -p 11211 -c 256 -P

/tmp/memcached.pid