[nycphp-talk] Need help understanding NULL

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Sat Aug 29 19:31:51 EDT 2009

Andy Dirnberger wrote:
> Before querying the database, I check to see if the result of the
> query has been cached.  I call a function that will either return the
> value in the cache or null, either because the cache has expired or
> because it was never set.  When I receive a return value other than
> null, I skip the database query.  When null comes back, I query the
> database and update the cache.

Andy, thanks a bunch for the example.


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