isset vs. empty for validation

[jasonyoung]

Simple question: Is there a difference between empty and isset when validating?

It appears they both return the same results in my trials, but I'm thinking there's a real reason they both exist. There must be a difference somewhere.

Thanks.

[RyanJones]

jasonyoung wrote:

Simple question: Is there a difference between empty and isset when validating?

It appears they both return the same results in my trials, but I'm thinking there's a real reason they both exist. There must be a difference somewhere.

Thanks.

Isset is used for checking that a var is actually defined, empty check if the valueis null 🙂

Cheers,

Ryan Jones

[laserlight]

It appears they both return the same results in my trials

Then your trials dont have sufficient coverage 🙂

but I'm thinking there's a real reason they both exist. There must be a difference somewhere.

When in doubt, consult the PHP Manual concerning [man]isset/man and [man]empty/man.

Isset is used for checking that a var is actually defined, empty check if the valueis null

Not exactly, since is_null() checks if a value is null. empty() also returns true for false values.