web/vendor/predis/predis/examples/key_prefixing.php

<?php

/*
 * This file is part of the Predis package.
 *
 * (c) Daniele Alessandri <suppakilla@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

require __DIR__.'/shared.php';

// Predis can prefix keys found in commands arguments before sending commands to
// Redis, even for complex commands such as SORT, ZUNIONSTORE and ZINTERSTORE.
// Prefixing keys can be useful to create user-level namespaces for you keyspace
// thus reducing the need for separate logical databases in certain scenarios.

$client = new Predis\Client($single_server, array('prefix' => 'nrk:'));

$client->mset(array('foo' => 'bar', 'lol' => 'wut'));
var_export($client->mget('foo', 'lol'));
/*
array (
  0 => 'bar',
  1 => 'wut',
)
*/

var_export($client->keys('*'));
/*
array (
  0 => 'nrk:foo',
  1 => 'nrk:lol',
)
*/