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I never understood this: in web development whe[n|re] does it make sense to fetch results one by one?
I mean, why should I use PDOStatement->fetch*() when I can use PDOStatement->fetchAll()?
fetchAll()will fetch all the results into one big array.With very large result sets, it could exceed the PHP script’s memory limit.
A pure
fetch()will fetch each record one by one, neutralizing that danger.That’s the only reason not to use
fetchAll()I can think of.