decr #

Decrements the number stored at key by 1. If the key does not exist, it is set to 0 before performing the operation.

[Redis documentation]

decr(key, [options], [callback]) #

Options #

Return Value #

Returns the MemoryStorage object to allow chaining.

Callback Response #

Returns an integer containing the updated key value.

Usage #

<?php
use \Kuzzle\Kuzzle;
$kuzzle = new Kuzzle('localhost');
try {
  $value = $kuzzle->memoryStorage()->decr('key');
}
catch (ErrorException $e) {
}

Callback response:

-1