why doesn't this work? - using && with an IF statement

[NotGiven]

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '')
echo "hello";

It doesn't throw an error it just doesn't display anything

However, this works:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))
echo "hello";

Thanks.

[Pedro Graca]

NotGiven wrote:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '') echo "hello"; (-----(============== =========))
The &&'s are outside the if () !!!
It doesn't throw an error it just doesn't display anything
I think you should have received a "parse error"
However, this works:
PHP can be nice sometimes, can't it? :)
session_start() ;
if (isset($HTTP_SE SSION_VARS[un'])) _______________ _______________ ^^^^^
I assume this is a typing mistake
echo "hello";

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[Gary L. Burnore]

On Thu, 8 Jul 2004 20:39:39 -0400, "NotGiven" <no****@nonegiv en.net>
wrote:

session_start( );
if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '')
Could it be that you missed the single quote before un' that you
missed here?

echo "hello";

It doesn't throw an error it just doesn't display anything

However, this works:

session_start( );
if (isset($HTTP_SE SSION_VARS[un']))
echo "hello";

Thanks.

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[Zurab Davitiani]

NotGiven wrote:

if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '')

Watch your parentheses and a missing single quote.

On a side note, unless you are writing this for older versions of PHP, you
should use $_SESSION array instead.

[Michael Austin]

NotGiven wrote:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '')
echo "hello";

It doesn't throw an error it just doesn't display anything

However, this works:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))
echo "hello";
because the echo statment is not a part of the if statement. you need

if (isset($HTTP_SE SSION_VARS['un'])) {
echo "hello";
}
Thanks.

you're welcome...

Michael Austin.

[Alvaro G Vicario]

*** NotGiven wrote/escribió (Thu, 8 Jul 2004 20:39:39 -0400):

However, this works:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))
echo "hello";

It doesn't:

Parse error: parse error, expecting `']''

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-- Álvaro G. Vicario - Burgos, Spain
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[michel]

"Michael Austin" <ma*****@firstd basource.com> wrote in message
news:V2******** *********@newss vr23.news.prodi gy.com...

NotGiven wrote:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))&&($HTTP_SESS ION_VARS['un'] != '')
echo "hello";

It doesn't throw an error it just doesn't display anything

However, this works:

session_start() ;
if (isset($HTTP_SE SSION_VARS[un']))
echo "hello";

because the echo statment is not a part of the if statement. you need

if (isset($HTTP_SE SSION_VARS['un'])) {
echo "hello";
}

That's not true. You only need these parenthesis when wanting to execute
more than one line.
in this case, where only the echo is done, he don't need those