On 03/22/2014 04:37 PM, Tim Streater wrote:
On 20 Feb 2014 at 12:28, Stuart Dallas <stuart@xxxxxxxx> wrote:
On 20 Feb 2014, at 12:25, Tim Streater <tim@xxxxxxxxxxxxxxxx> wrote:
and then later I do:
$str = "fcc: " . $PTR_fcc;
Now, upon examination it appears that I have an instance where $str ends up
as:
fcc: undefined
My question is, under what conditions can a variable be set by the PHP system
to the string "undefined"? Would this require that my ajax call in the
browser would have to have had something explicit like:
... &PTR_fcc=undefined …
Not explicit as such, but that is what’s happening. Javascript will use the
string "undefined" whenever an undefined variable is concatenated on to a
string.
How about if PTR_fcc is not so much undefined on the JavaScript side, as an empty string. So that I'm passing e.g. this, via AJAX:
... &PTR_fcc=&myvar=27 ...
What does that mean in my PHP script when I then do:
$PTR_fcc = isset($_POST['PTR_fcc'])==true ? $_POST['PTR_fcc'] : 0;
i.e. what value does $_POST['PTR_fcc'] have?
http://www.php.net/manual/en/function.var-dump.php is your new best friend!
--
Cheers -- Tim
--
Jim Lucas
http://www.cmsws.com/
http://www.cmsws.com/examples/
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