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Databases (NoSQL)

Redis

The Redis client provides a simple and consistent way of communicating with a Redis server.

Usage

Basics

Creating a database connection is done using the ConnectionManager::connection method.

// Returns connection object using the "default" redis configuration defined in the config file

$redis = $this->redis->connection();

// Returns connection object using the "mydb" redis configuration defined in the config file

$redis = $this->redis->connection('mydb');

The Redis class uses the magic __call method so every current (and future) Redis command is a valid method.

// Add some dummy data

$redis->rpush('drinks', 'water');
$redis->rpush('drinks', 'milk');
$redis->rpush('drinks', 'orange juice');

// Fetches all the drinks

$drinks = $redis->lrange('drinks', 0, -1);

// Delete data

$redis->del('drinks');

If the redis command contains spaces (CONFIG GET, CONFIG SET, etc ...) then you'll have to separate the words using camel case or underscores.

// Use camel case to separate multi word commands

$redis->configGet('*max-*-entries*');

// You can also use underscores

$redis->config_get('*max-*-entries*');

The pipeline method allows you to send multiple commands to the Redis server without having to wait for the replies. Using pipelining can be useful if you need to send a large number of commands as you will not be paying the cost of round-trip time for every single call.

$redis->set('x', 0);

$replies = $redis->pipeline(function($redis)
{
	for($i = 0; $i < 100; $i++)
	{
		$redis->incr('x');
	}
});

Magic shortcut

You can access the default redis connection directly without having to go through the connection method thanks to the magic __call method.

$exists = $this->redis->exists('drinks');