SM wrote:
> On May 8, 12:31 pm, Piotr <s...@poczta.onet.pl> wrote:
>> SM wrote:
>>> On May 8, 11:50 am, SM <servandomont...@gmail.com> wrote:
>>>> On May 8, 11:42 am, Piotr <s...@poczta.onet.pl> wrote:
>>>>>>> $thumb = 1;
>>>>>>> $item = '$thumbs_cat_' . $thumb; //this outputs a string:
>>>>>>> $thumbs_cat_1
>>>>>>> $item_total = sizeof($item);
>>>>>>> output: Nothing!
>>>>>>> How do i pass a variable to the 'sizeof' function?
>>>>>> You should use variable variable:
>>>>>> $item_total = sizeof($$item);
>>>>>> Mark double $$
>>>>>> This is true in any situation, not only with sizeof
>>>>> Forgot about one small detail:
>>>>> $item = 'thumbs_cat_' . $thumb; //this outputs a string:
>>>>> ---------^ loose the '$';
>>>>> best regards
>>>>> Piotr N
>>>> I don't need the length of the string , just the actual variable. But
>>>> i did like the fact that sizeof is an alias of count. So i will use
>>>> count instead.
>>>> I didn't know about the $$ tip. Wow! so easy. Thanks, It Works!
>>>> Heres the final code:
>>>> $thumb = 1;
>>>> $item = 'thumbs_cat_' . $thumb;
>>>> $item_total = count($$item);
>>>> Thanks again
>>>> Marco
>>> Maybe i should open a new post for this one, but here it goes:
>>> I'm stock! When i want to reference that variable in a echo statment,
>>> it does't work. Any suggestions?
>>> Thanks
>>> <li><a href="<?php echo $SERVER['PHP_SELF']; ?>?cat=<?php echo
>>> $category_this; ?>"><img src="images/<?php echo($$item[$i]);?>"
>>> alt="" /></a></li>
>> :)
>> It should look like this. Mark the { and }
>> echo ${$item[$i]};
>>
>> As a side note, is this really best way to access needed data this way ?
>> Cant you keep original values in the array instead of the variable names ?
>>
>> best regards
>> Piotr N
>
> I've tried it, It doesn't work. When i look at the source code, i see
> an empty string:
> <img src="images/" alt="" />
>
> Here's what im trying to do:
> -From a list, the user selects the category of discography (either
> original, compilation, tributes, other)
> -Each type of discography is associated with an array that contains
> the name of the cd covers.
> -Then i show a thumbnail (using a loop) of all the cd covers.
>
> my arrays look like this (one for each category of discography)
> $thumbs_cat_1 = array('moonlight.jpg'', shadow.jpg', 'luna.jpg');
> $thumbs_cat_2 = array(...);
> $thumbs_cat_3 = array(...);
> $thumbs_cat_4 = array(...);
>
> Then i create the thumbs like this:
> for($i=0; ...){
> ...<img src="images/discography/thumbs/<?php echo $thumbs_cat_1[$i]; ?
>> " alt="" />
> }
>
> All of this works perfectly for the first array.
>
>
> That's why, i think, i need a variable that contains the selection
> from the user (the category of discography) so i can select values
> from the correct array.
> I do it like this:
>
> $cat = $_GET['cat']; //output: 1
> $sel_array = 'thumbs_cat_' . $cat;//create the string: thumbs_cat_1
>
>
>
>
> Then i create the thumbs like this:
> for($i=0; ...){
> ...<img src="images/discography/thumbs/<?php echo ${$sel_array[$i]}; ?
>> " alt="" />
> }
> ... and so on
>
> You think my code makes sense? Maybe i'm doing it wrong.
> The last part is were im stock...
>
>
> Any ideas what's wrong?
> Thanks again
> Marco
>

Why go to all that trouble. Just use a two dimensional array, i.e.

$thumb_cats = array();
$thumb_cats[] = array('moonlight.jpg'', shadow.jpg', 'luna.jpg');
$thumb_cats[] = array(...);
$thumb_cats[] = array(...);
$thumb_cats[] = array(...);
$thumb_cats[] = array(...);

<img src="images/discography/thumbs/<?php echo $thumb_cats[$sel][$i];?>"
alt="" />

Much cleaner.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================