Need help with editing a rotate.php file

[freshJet]

Here is the code I have for my image rotator:

<?php

/*
DOWNLOADED FROM http://www.marcofolio.net/
Check it out for more interesting scripts & downloads

AUTOMATIC IMAGE ROTATOR
Version 2.2 - December 4, 2003
Copyright (c) 2002-2003 Dan P. Benjamin, Automatic, Ltd.
All Rights Reserved.

http://www.hiveware.com/imagerotator.php

http://www.automaticlabs.com/


DISCLAIMER
Automatic, Ltd. makes no representations or warranties about
the suitability of the software, either express or
implied, including but not limited to the implied
warranties of merchantability, fitness for a particular
purpose, or non-infringement. Dan P. Benjamin and Automatic, Ltd.
shall not be liable for any damages suffered by licensee
as a result of using, modifying or distributing this
software or its derivatives.


ABOUT
This PHP script will randomly select an image file from a
folder of images on your webserver.  You can then link to it
as you would any standard image file and you'll see a random
image each time you reload.

When you want to add or remove images from the rotation-pool,
just add or remove them from the image rotation folder.


VERSION CHANGES
Version 1.0
	- Release version

Version 1.5
	- Tweaked a few boring bugs

Version 2.0
	- Complete rewrite from the ground-up
	- Made it clearer where to make modifications
	- Made it easier to specify/change the rotation-folder
	- Made it easier to specify/change supported image types
	- Wrote better instructions and info (you're them reading now)
	- Significant speed improvements
	- More error checking
	- Cleaner code (albeit more PHP-specific)
	- Better/faster random number generation and file-type parsing
	- Added a feature where the image to display can be specified
	- Added a cool feature where, if an error occurs (such as no
	  images being found in the specified folder) *and* you're
	  lucky enough to have the GD libraries compiled into PHP on
	  your webserver, we generate a replacement "error image" on
	  the fly.

   Version 2.1
       - Updated a potential security flaw when value-matching
         filenames

   Version 2.2
       - Updated a few more potential security issues
       - Optimized the code a bit.
       - Expanded the doc for adding new mime/image types.

       Thanks to faithful ALA reader Justin Greer for
       lots of good tips and solid code contribution!


INSTRUCTIONS
1. Modify the $folder setting in the configuration section below.
2. Add image types if needed (most users can ignore that part).
3. Upload this file (rotate.php) to your webserver.  I recommend
   uploading it to the same folder as your images.
4. Link to the file as you would any normal image file, like this:

		<img src="http://example.com/rotate.php">

5. You can also specify the image to display like this:

		<img src="http://example.com/rotate.php?img=gorilla.jpg">

	This would specify that an image named "gorilla.jpg" located
	in the image-rotation folder should be displayed.

That's it, you're done.

*/




/* ------------------------- CONFIGURATION -----------------------


Set $folder to the full path to the location of your images.
For example: $folder = '/user/me/example.com/images/';
If the rotate.php file will be in the same folder as your
images then you should leave it set to $folder = '.';

*/


$folder = 'lib/skins/premiumseries/images/ads';


/*	

Most users can safely ignore this part.  If you're a programmer,
keep reading, if not, you're done.  Go get some coffee.

   If you'd like to enable additional image types other than
gif, jpg, and png, add a duplicate line to the section below
for the new image type.

Add the new file-type, single-quoted, inside brackets.

Add the mime-type to be sent to the browser, also single-quoted,
after the equal sign.

For example:

PDF Files:

	$extList['pdf'] = 'application/pdf';

   CSS Files:

       $extList['css'] = 'text/css';

   You can even serve up random HTML files:

    $extList['html'] = 'text/html';
    $extList['htm'] = 'text/html';

   Just be sure your mime-type definition is correct!

*/

   $extList = array();
$extList['gif'] = 'image/gif';
$extList['jpg'] = 'image/jpeg';
$extList['jpeg'] = 'image/jpeg';
$extList['png'] = 'image/png';


// You don't need to edit anything after this point.


// --------------------- END CONFIGURATION -----------------------

$img = null;

if (substr($folder,-1) != '/') {
$folder = $folder.'/';
}

if (isset($_GET['img'])) {
$imageInfo = pathinfo($_GET['img']);
if (
    isset( $extList[ strtolower( $imageInfo['extension'] ) ] ) &&
       file_exists( $folder.$imageInfo['basename'] )
   ) {
	$img = $folder.$imageInfo['basename'];
}
} else {
$fileList = array();
$handle = opendir($folder);
while ( false !== ( $file = readdir($handle) ) ) {
	$file_info = pathinfo($file);
	if (
	    isset( $extList[ strtolower( $file_info['extension'] ) ] )
	) {
		$fileList[] = $file;
	}
}
closedir($handle);

if (count($fileList) > 0) {
	$imageNumber = time() % count($fileList);
	$img = $folder.$fileList[$imageNumber];
}
}

if ($img!=null) {
$imageInfo = pathinfo($img);
$contentType = 'Content-type: '.$extList[ $imageInfo['extension'] ];
header ($contentType);
readfile($img);
} else {
if ( function_exists('imagecreate') ) {
	header ("Content-type: image/png");
	$im = @imagecreate (100, 100)
	    or die ("Cannot initialize new GD image stream");
	$background_color = imagecolorallocate ($im, 255, 255, 255);
	$text_color = imagecolorallocate ($im, 0,0,0);
	imagestring ($im, 2, 5, 5,  "IMAGE ERROR", $text_color);
	imagepng ($im);
	imagedestroy($im);
}
}

?>

At the moment, it displays the same picture 3 times (the html code is <img src="rotate.php /> repeated 3 times), but I want it to display 3 different pictures each time.

What do I edit?

[James142]

Maybe try this one? http://www.abcpchelp.com/multiple-random-images-rotation-php-script/multiple-random-images-rotation-php-script.php