On Feb 20, 2013, at 9:10 AM, Jim Giner <jim.gi...@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 ____________________ t...@sperling.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
