Posted by Richard Lynch on 06/22/23 11:05

Thomas Goyne wrote:
> On Sun, 09 Jan 2005 15:59:43 +0100, M. Sokolewicz <tularis@php.net> wrote:
>
>> that's not a SPECIFIC place in the array, that's just current, next and
>> previous. AFAIK there is no way to explicitly set the internal pointer
>> of the array to a spcified place. I used a function which basically
>> looped trough the array until it got to the correct depth, and then
>> returned it by reference....but it's not very efficient :S
>>
>
> Why would you ever want to do that other than to waste cycles?

I'll give you a simple case.

I have a GTK PHP MP3 ID3 editor application I'm working on.

When one opens a file in a directory, I provide next/prev buttons to
quickly page to the next/prev file in the directory.

Getting the next/prev to work is simple enough, but...

I've got the whole array built from opendir/readdir, and sorted it into
alphabetical order.

I've got a filename inside that array, from the pre-defined
GtkFileSelection dialog.

So I need to initialize the internal array pointer to the position of the
file within that array, there is no such PHP function.

See also:
http://bugs.php.net/bug.php?id=31375

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