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Posted by shimmyshack on 03/03/07 20:12
On 3 Mar, 20:06, "J.O. Aho" <u...@example.net> wrote:
> Fred Atkinson wrote:
> > I need a PHP script that can be invoked refererencing a
> > subdirectory where thumbnails are stored and have it randomly display
> > one of those thumbnails.
>
> > To expand upon my needs, here is the hierarchy of the Web
> > site:
>
> > main pages public_html
>
> > subpages apple banana coconut
>
> > sub-subpages aa bb cc dd ee ff gg
>
> > Each of the aa-gg subdirectories will contain thumbnail .jpg
> > files. I'd like to be able to invoke the script quite a few times
> > within the same PHP page.
> > From the page in /banana, use <?php random_image $dir=aa> to
> > return a thumbnail that it randomly took from sub page /banana/aa. I
> > would invoke a thumbnail from another directory by changing aa to bb,
> > cc, dd, ee, ff, or gg.
>
> Make a file that you can include in your pages
>
> --- randomimg.php ---
> class randomimg {
>
> protected $imgs=array();
> protected $basepath;
>
> function randomimg($base='.') {
> $this->basepath=$base;
> }
>
> function getimg($path) {
> if(empty($this->imgs[$path])) {
> $this->imgs[$path]=scandir($this->basepath.'/'.$path);
> }
>
> /* Older versions need srand to work */
> $version=explode('.',phpversion());
> if((intval($version[0])<4) || ((intval($version[0])==4) &&
> (intval($version[1])<2))) {
> /* We have PHP 4.1 or older, so we need srand() to get random
> numbers */
> list($usec, $sec) = explode(' ', microtime());
> srand((float) $sec + ((float) $usec * 100000));
> }
>
> return $path.'/'.$this->imgs[$path][rand(0,count($this->imgs[$path])-1)];
> }}
>
> --- eof ---
>
> > From the page in /banana, use <?php random_image $dir=aa> to
> > return a thumbnail that it randomly took from sub page /banana/aa. I
> > would invoke a thumbnail from another directory by changing aa to bb,
> > cc, dd, ee, ff, or gg.
>
> in the page where you need the random images:
>
> --- subpages.php ---
> include_once('randomimg.php')
> $images= new randomimg();
>
> $path_to_the_image=$images->getimg('aa');
> --- eof ---
>
> --- main_pages.php ---
> include_once('randomimg.php')
> $images= new randomimg();
>
> $path_to_the_image=$images->getimg('coconut/bb');
> --- eof ---
>
> It will just read a directory once, store all the files/directories in an
> array and if the same directory is used more than once, it will skip the part
> of scanning the directory.
>
> Of course, I would most likely used a database for the file names/paths,
> classes and so on.
>
> --
>
> //Aho
and then why not use sessions, store 200 in there, job done no further
problem, hmm
are we forgetting the newbie OP here?
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