Hi:

I need to be able to rotate or random read the contents of slider directory. This in php since it woill be used in the web. Right now I have the code below

$sliderFile = "system/cache/slider/".$_GET["id"].".dat";

I managed to hardcode a specific file. But I am interesting in some kind of rotation beetwen file sin the slider dir or random choose of ém.

Any help will be appreciated!!

Conceptually, store list of filenames in array by number.
Generate random num in range 0 - (num array elements -1)
retrieve filename at array[random_num]

I'm really not sure what you're trying to do, your post is really unclear. But, I trust that it's what chrism01 describes. So here goes.

Haven't tested that, but I guess you can do that. And by the way, scandir also returns "." and ".." as file names. If you want to get rid of them, do array_shift twice. Cheers.

do they (., ..) always come first in output ? are you sure? (me no PHP programmer)

You are right chrism, they don't always come in first, thank you for pointing that out.

As the documentation for scandir states, they come in a sorted order. So, if we have file names beginning with !,$,%,&,*, and so on they will come up before '.' and '..' , thus creating a problem. One solution would be avoiding these file names .

Another would be array_search and then checking in the foreach or, if this makes the efficiency daemon within you anxious, you can use array_splice to reduce them, or something else..

Anyway, I recommend only using decent characters for file names, it's by far the most efficient solution. Cheers.

Hi

Thank you for the reply. But How I select a random file from that directory? See what I want:


$sliderFile = "system/cache/slider/".$_GET["id"].".dat";

The slider directory have these files:

1.dat
168.dat
34.dat
38.dat
489.dat

The number is the user id of the cms I am using. I want to be able to random select one of those files to made the row above look like:

$sliderFile ="system/cache/slider/randomfile_selected.dat";

So the above string some times will have

$sliderFile = "system/cache/slider/38.dat";
$sliderFile = "system/cache/slider/489.dat";

and so on...

Thanks again!

Hi:

The final code and fix is this.

Thanks!

n3cb: I did wonder; in Perl it's std to say:

next if( $file =~ /^\.\.?$/ );

or variations thereon eg:

next unless -f "${evts_dir}/${evt_file}"; # regular files only

Yup, that's really nice. I've been thinking of learning perl, I might just do it.

Here ya go: http://perldoc.perl.org/

Thank you