> Jim Giner <jim.gi...@albanyhandball.com> hat am 20. Februar 2013 um 15:10
> Basically it tells a savvy programmer whether or not his logic has
> caused the var in question to "exist". Many times it is important
> simply to know that, not what the var contains, which can lead to an
> error in processing.
> The isset() will tell you that "yes, I have this variable", letting you
> then correctly interpret the contents. If a $_POST var is not set
> (meaning the user made no input to it), the use of empty() will insist
> on telling you that the var is empty even tho it really was not provided
> by the user (assuming that you don't get an error msg for having an
> invalid index in the POST array).
keep in mind that isset returns false if the variable exists, but has a value of
null. The same applies to existing array keys with value null.
> They seem to be needlessly redundant, but in fact do provide knowledge
> for those seeking it.
No, they are not as I wrote in my last message
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