Memcached之PHP调用
通过PHP调用Memcahce,首先需要在服务器上安装Memcache,如何安装Memcache不是本文的重点,
关于memcache的安装,有兴趣的朋友请参考这里:http://blog.csdn.net/xifeijian/article/details/22000173
下面用一个最简单的Demo,介绍使用如何使用php来调用Memcahce。
一:安装memcache PHP模块
#wget http://pecl.php.net/get/memcache-2.2.4.tgz
# tar zxvf memcache-2.2.4.tgz
# cd memcache-2.2.4
查找phpize路径
#whereis phpize
这里是/root/app/php-5.3.3/bin/phpize(一般在php安装路径的bin目录下)
# /root/app/php-5.3.3/bin/phpize
# ./configure --enable-memcache --with-php-config=/root/app/php-5.3.3/bin/php-config
# make
# make install
在php.ini文件添加一行(/etc目录下)
extension=memcache.so
重启httpd
#service httpd restart
php里使用phpinfo()看到memcache相关说明信息,才说明memcached扩展安装好。
注:如果仅使用php -m来查看php所加载的扩展,这个并不能表示扩展已经生效。
注意:
安装完后可能会有类似这样的提示:
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20050922/
把这个记住,然后修改php.ini,把
extension_dir = "./"
修改为
extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20050922/"
并添加一行
extension=memcache.so
二:PHP调用memcached
自己写一个PHP程序测试一下
<?php $memcache = new Memcache; //创建一个memcache对象 $memcache->connect('localhost', 9023) or die ("Could not connect"); //连接Memcached服务器 $memcache->set('key', 'Hello,XiFeiJian'); //设置一个变量到内存中,名称是key 值是test $get_value = $memcache->get('key'); //从内存中取出key的值 echo $get_value; ?>
二:附:memcached常用操作
<?php //连接Memcache $mem = new Memcache; $mem->connect("localhost", 11211); //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>"; //保存数组数据 $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>"; //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(); ?>

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