Re: if (empty versus if (isset

On Feb 20, 2013, at 9:10 AM, Jim Giner <jim.giner@albanyhandball.com> wrote: > 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). > > They seem to be needlessly redundant, but in fact do provide knowledge for those seeking it. > That's one of the reason why I recommend using a Ternary Operator to check the POST array, such as: $submit = isset($_POST['submit']) ? $_POST['submit'] : null; That way, you never encounter an error looking for something that is not there. Cheers, tedd ____________________ tedd@sperling.com http://sperling.com