Re: isset or ! isset what is my problem?

On Monday 02 January 2006 8:54 pm, Ralph wrote:
> I'm building a URL based on data extracted from mySQL and I want the
> text space.gif used as my default value should the variable $picture
> by NULL.
>
> The results of the code below kick back a value for $picture when it
> is set in the database, but ignores the space.gif if the database
> result is empty.

Have you tried strlen()?

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isset or ! isset what is my problem?

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I'm building a URL based on data extracted from mySQL and I want the
text space.gif used as my default value should the variable $picture
by NULL.

The results of the code below kick back a value for $picture when it
is set in the database, but ignores the space.gif if the database
result is empty.

If I flip the test from ! isset to isset then I get the space.gif for
each result.


I've had no luck searching out an answer.

Thanks in advance.

--------------The Code-----------------------------

span>

span>

Showtime: ['ShowTime']; ?>

Location: ['Location']; ?>

Re: isset or ! isset what is my problem?

NULL != Not set.

isset() tests to see if the variable exists. If your variable has a null value
it is set, it DOES exist, it just has NULL for a value. You should test for a
null value if that's what you want:

if ($picture == null)

Or perhaps the empty() function might be what you're looking for.

-Micah


On Monday 02 January 2006 7:54 pm, Ralph wrote:
> I'm building a URL based on data extracted from mySQL and I want the
> text space.gif used as my default value should the variable $picture
> by NULL.
>
> The results of the code below kick back a value for $picture when it
> is set in the database, but ignores the space.gif if the database
> result is empty.
>
> If I flip the test from ! isset to isset then I get the space.gif for
> each result.
>
>
> I've had no luck searching out an answer.
>
> Thanks in advance.
>
> --------------The Code-----------------------------
>
>

>

> span>

> > span>

Showtime: > ['ShowTime']; ?>

Location: > ['Location']; ?>

Re: isset or ! isset what is my problem?

> On Monday 02 January 2006 7:54 pm, Ralph wrote:
>
>>I'm building a URL based on data extracted from mySQL and I want the
>>text space.gif used as my default value should the variable $picture
>>by NULL.
>>
>>The results of the code below kick back a value for $picture when it
>>is set in the database, but ignores the space.gif if the database
>>result is empty.
>>
>>If I flip the test from ! isset to isset then I get the space.gif for
>>each result.
>>
>>
>>I've had no luck searching out an answer.
>>
>>Thanks in advance.
>>
>>--------------The Code-----------------------------
>>
>>

>>

>>span>

>> >>span>

Showtime: >>['ShowTime']; ?>

Location: >>['Location']; ?>

Re: isset or ! isset what is my problem?

Actually this has nothing to do with rows. I'm just trying to
substitute a value when a query returns an empty value.



On Jan 3, 2006, at 5:24 AM, El Bekko wrote:

>> On Monday 02 January 2006 7:54 pm, Ralph wrote:
>>> I'm building a URL based on data extracted from mySQL and I want the
>>> text space.gif used as my default value should the variable $picture
>>> by NULL.
>>>
>>> The results of the code below kick back a value for $picture when it
>>> is set in the database, but ignores the space.gif if the database
>>> result is empty.
>>>
>>> If I flip the test from ! isset to isset then I get the space.gif
>>> for
>>> each result.
>>>
>>>
>>> I've had no luck searching out an answer.
>>>
>>> Thanks in advance.
>>>
>>> --------------The Code-----------------------------
>>>
>>>

>>>

>>> > >>> span>

>>> >>> > >>> span>

Showtime: >>> ['ShowTime']; ?>

Location: >>> ['Location']; ?>