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

[Redis documentation]

decrby(key, value, [options], [callback])

Arguments Type Description
key string Key identifier
value int Decrement value
options JSON Object Optional parameters
callback function Callback


Option Type Description Default
queuable boolean Make this request queuable or not true

Return Value

Returns the MemoryStorage object to allow chaining.

Callback Response

Returns an integer containing the updated key value.


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use \Kuzzle\Kuzzle;
$kuzzle = new Kuzzle('localhost');
try {
  $value = $kuzzle->memoryStorage()->decrby('key', 42);
catch (ErrorException $e) {

Callback response:

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