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* This file is part of the Predis package.
* (c) Daniele Alessandri <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
require 'SharedConfigurations.php';
// This example will not work with versions of Redis < 2.6.
// Additionally to the EVAL command defined in the current development profile, the new
// Predis\Commands\ScriptedCommand base class can be used to build an higher abstraction
// for our "scripted" commands so that they will appear just like any other command on
// the client-side. This is a quick example used to implement INCREX.
use Predis\Commands\ScriptedCommand;
class IncrementExistingKey extends ScriptedCommand
public function getKeysCount()
return 1;
public function getScript()
local cmd =
if cmd('exists', KEYS[1]) == 1 then
return cmd('incr', KEYS[1])
$client = new Predis\Client($single_server, 'dev');
$client->getProfile()->defineCommand('increx', 'IncrementExistingKey');
$client->set('foo', 10);
var_dump($client->increx('foo')); // int(11)
var_dump($client->increx('bar')); // NULL
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