array pointer problems

[Anon]

I've got a very simple process I'm trying to fix. I read ID's out of a Db into an array. I'm then wanting to be able to click forward or backward to 'scroll' through a picture gallery. The next() function works once, but never again. Here is what happens:

The user clicks forward or backward, if forward is clicked a forward=yes hidden variable is sent, if that is found the next($arr); is used. I'm reloading the same page in my forms if that makes any difference.

Thanks

[Anon]

But $arr is not kept in memory. Every time you run the script, the array pointer will start at 0, so you can't use next(). Instead of forward=yes, pass the actual index in the array.

Diego

[Anon]

would I then do an array_search() and move the pointer there, then do the next() ?

[Anon]

No, just pass the index in the array.

For example, if the current picture is 5, then the "next" link will be:

script.php?num=6

and the "previous" link will be
script.php?num=4

And in your code you just use $array[$_GET['index']];

Diego

[Anon]

except this user will be adding/deleting and that is the primary index for the mysql db...it will not always be incrementing by 1. It may be 1,2,3,7,9,17,20,21,22,23

I need to be able to find the 'old' index number, set that key as current and then use next()... any suggestions?

[kailien]

how many pictures are you showing per page? one?

what you need is a page navigation system? do a search in the forum or read one of the articles regarding page navigation.

[Anon]

just add some conditional logic to find out the next/prev numbers in the sequence and use those for your links.

[jc94062]

If your using PHP4 use foreach.