PHP Redis Storage Session Example detailed

Install the Redis service and the PHP redis extension

One: Redis installation

Download, extract and compile Redis with:
$ wget http://download.redis.io/releases/redis-3.0.4.tar.gz
$ tar xzf redis-3.0.4.tar.gz
$ CD redis-3.0.4
$ make
The binaries that are now compiled are available in the SRC directory. Run Redis with:
$ src/redis-server
Can interact with Redis using the built-in client:
$ src/redis-cli
Redis> set Foo Bar
Ok
Redis> get foo
"Bar"

More:http://www.redis.io/download

Second, PHP expansion:

More version: Http://pecl.php.net/package/redis
wget http://pecl.php.net/get/redis-2.2.5.tgz
#解压
Tar zxvf redis-2.2.5.tgz
#进入安装目录
CD redis-2.2.5
/usr/local/php/bin/phpize
#配置
./configure--with-php-config=/usr/local/php/bin/php-config
#编译安装
Make && make install

After the installation is complete, the following installation path appears

/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/

Configuring PHP Support

#编辑配置文件, add the following on the last line

Vim/usr/local/php/etc/php.ini
extension= "Redis.so"

This time phpinfo () can see the redis extension.

Redis Small Example:

$redis = new Redis ();
$test = $redis->connect (' 127.0.0.1 ', 6379);
Var_dump ($test);

$result = $redis->set (' Test ', ' 111cn.net ');
Var_dump ($result); Result: BOOL (TRUE)

$result = $redis->get (' Test ');
Var_dump ($result); Result: String (one) "111cn.net"

Modify the php.ini settings

Session.save_handler = Redis
Session.save_path = "tcp://127.0.0.1:6379"

After modification, restart Php-fpm,phpinfo () to see that the session is stored in Redis.

If you do not want to modify php.ini, you can add it in your code:

Ini_set ("Session.save_handler", "Redis");
Ini_set ("Session.save_path", "tcp://127.0.0.1:6379");

If redis.conf sets the connection password (requirepass), the Save_path of the session needs to be modified to: the Tcp://127.0.0.1:6379?auth=requirepass value.
If you choose Redis Database, Session.save_path = "tcp://xx.xx.xx.xx:6789?database=11", and so on.

To view the value of the Redis store session:

<?php
Session_Start ();
$_session[' sessionid '] = ' www.111cn.net ';

$redis = new Redis ();
$redis->connect (' 127.0.0.1 ', 6379);
Redis with phpredis_session: Add session_id as key, and is stored as string
echo $redis->get (' phpredis_session: '. session_id ()); Output www.111cn.net
?>

See someone on the Internet question Redis storage session value There is concurrency consistency problem (file storage sessions have file locks to handle), this piece is not studied.