Re: [PHP] empty and isset

[John Nichel]

It's fairly easy. isset returns true if the VARIABLE itself exists, like if it's been declared, or set by a form. isset isn't checking the VALUE of the VARIABLE, just if it exists. In Jason's example below, isset returns false because the VARIABLE was never declared in some way, shape or form. Technically, it doesn't exist. empty returns true because the VARIABLE $doo, declared or not, has no VALUE.

VARIABLE and VALUE...two different things.

Jason Wong wrote:

On Thursday 06 February 2003 22:50, [EMAIL PROTECTED] wrote:

<input> of type text are set regardless of whether you have entered
anything.
Thus isset() returns true.

Actually, I believe it's not a matter of the input being set, but the fact
that isset() returns true on an empty variable.

Try this:

<?php

if (isset($doo)) {
print '$doo is set'; // does not get printed
}
if (empty($doo)) {
print '$doo is empty'; // gets printed
} ?>

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