| Re: Parameter passing question [message #173547 is a reply to message #173543] |
Mon, 18 April 2011 18:34   |
Chuck Lavin
Messages: 5
Registered: April 2011
Karma:
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Junior Member |
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I have this IF statement:
if (isset($_SESSION['COMPANY_CODE'])) {
$COMPANY_CODE = $_SESSION['COMPANY_CODE'];
} else {
$query = parse_str($_SERVER['QUERY_STRING']);
$COMPANY_CODE = $app;
$_SESSION['COMPANY_CODE'] = $COMPANY_CODE;
}
It currently does the reverse of what I need it to do. This block gives
precedence to the session variable. If the session variable exists, the
passed parameter is ignored.
I need to give precedence to the passed parameter. If the parameter is
passed (either with a value or empty), I need to modify the session variable
accordingly. If the parameter is not passed, I want to leave the session
variable untouched.
As I understand it, checking for isset($app) will not tell the difference
between http://www.somewhere.com/?app= and http://www.somewhere.com .
"Chuck Lavin" <x(at)x(dot)x> wrote in message
news:Qk%qp(dot)16994$7N3(dot)5715(at)newsfe10(dot)iad...
> My point exactly. How can I tell if a URL does not reference a parameter
> at all?
>
> I need to move passed parameters into session variables:
>
> 1) If a parameter is passed with a value, set the session variable with
> that
> value;
>
> 2) If a parameter is passed with an empty value, get rid of that session
> variable;
>
> 3) If a parameter is not passed at all (not referenced in the URL), don't
> touch the session variable.
>
> Tnx
> CL
>
> "Unrest" <unrest(at)nullvector(dot)org> wrote in message
> news:4dac7f92$0$68307$afc38c87(at)news5(dot)united-newsserver(dot)de...
>> Am Mon, 18 Apr 2011 17:42:31 +0000 schrieb Denis McMahon:
>>> <?php
>>> if (isset($_GET['x'])) {
>>> if ($_GET['x'] == null) {
>>> // it's null
>>> } else {
>>> // it has data
>>> }
>>> } else {
>>> // it's not defined
>>> }
>>> ?>
>>>
>>
>> isset() checks if a variable exists and _is not null_.
>> -> http://de.php.net/manual/en/function.isset.php
>>
>> so your "if ($_GET['x'] == null)" will never evaluate to true.
>>
>>
>> Yours,
>> Michael
>>
>
>
>
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