How to configure memcache in php

This article mainly introduces how to configure memcache in PHP, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

1. Memcache concept

First of all We must distinguish three concepts: Memcached, memcache and memcached.
1. Memcached refers to the Memcached server, which is an independently running Memcached background server. Just like mysqld, it is a key-value pair used to store data. "Database".
2. Memcached and memcache are both Memcached clients, and you can access and connect to the Memcached server through them. They are both PHP plug-ins. The difference between the two is an old topic, you can refer to Other articles say. I personally feel that memcached is better. After all, it has many functions and is based on the extension of libmemcached.

2. Memcached server installation and testing

If it is fedora, there are built-in sources memcached, you can install it directly with yum

yum -y install memcached.x86_64

After installation, start the background process.

 memcached -d -m 10 -u user -l 127.0.0.1 -p 12000 -c 256 -P /tmp/memcached.pid

Among them, -d means to start the background service process, -m means the maximum use of 10m memory, -u means the current User, -l represents the ip address, -p represents the port number, -c represents the maximum number of concurrent connections, and -P represents the location of the pid file. Other parameters can be directly queried by man memcached.

Now you can use telnet to test Next, check the opening status of memcached.

telnet 127.0.0.1 12000Trying 127.0.0.1...Connected to 127.0.0.1.
Escape character is '^]'.
set a 0 0 41234STORED
get a
VALUE a 0 41234END
^C
quit

The above message indicates that the Memcached server is installed successfully.

3. Installation and testing of memcache

wget -c http://pecl.php.net/get/memcache-3.0.8.tgztar zxvf memcache-3.0.8.tgz
phpize && ./configure --enable-memcache --with-php-config=/usr/local/php/bin/php-configmake && make install

In this way, a line of Installing shared extensions will appear below: /usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/
The so file is generated, and then just import this module in the php.ini file.

extension_dir=/usr/local/php/lib/php/extensions/no-debug-non-zts-20131226/extension=memcache.so

Then restart php-fpm to load php.ini, check phpinfo. If you see memcached, it means the module installation is successful. Sometimes php.ini may not be loaded. You can force php-fpm to load the ini file.

php-fpm -c /usr/local/php/lib/php.ini

Test memcached in the php file.

<?php
$memcache = memcache_connect(&#39;localhost&#39;, 12000);
if ($memcache) {    
$memcache->set("key1", "String");    
$memcache->set("key2", 123);    
$object = new StdClass;   
$object->attribute = &#39;test&#39;;    
$memcache->set(&#39;key3&#39;, $object);

    var_dump($memcache->get(&#39;key1&#39;));
    var_dump($memcache->get(&#39;key2&#39;));
    var_dump($memcache->get(&#39;key3&#39;));
} else {    
echo "Connection to memcached failed";
}
?>

You can know whether the access is successful by accessing it through the browser.

There is a file called memcache.php in memcache, you can check the operation of the memcache server Status.
Modify the memcache.php file.

#$MEMCACHE_SERVERS[] = 'mymemcache-server1:11211'; // add more as an array
#$MEMCACHE_SERVERS[] = 'mymemcache-server2:11211'; // add more as an array
$MEMCACHE_SERVERS[] = 'localhost:12000';

You can see the status of the memcached server when you open the browser.

4. Installation and testing of memcached

Installation It’s similar to memcache, but you need to install libmemcached first.

yum -y install libmemcached.x86_64

Then just follow the installation and testing methods of memcache.

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