# Method Cache.cache()->alookup()

Method alookup

  ``void` alookup(`string` `key`, `function`(`string`, `mixed`, `mixed` ... :`void`) `callback`, `int`|`float` `timeout`, `mixed` ... `args`)`

Description

  Asynchronously look the cache up. The callback will be given as arguments the key, the value, and then any user-supplied arguments. If the timeout (in seconds) expires before any data could be retrieved, the callback is called anyways, with 0 as value.