Here you go ... a little image rotation snippet !

You can use this for image rotation next to your adsense ads so when your visitors are browsing through your site they will se different image every time they refresh.

It is pretty self explanatory how to use this I hope

<?php
$path_to_images = "images/";  // path to your images
$default_img = "turtle.gif";  // image to display if directory listing fails

function getRandomImage($path, $img) {
   if ( $list = getImagesList($path) ) {
       mt_srand( (double)microtime() * 1000000 );
       $num = array_rand($list);
       $img = $list[$num];
   }    return $path . $img;
}

function getImagesList($path) {
   $ctr = 0;
   if ( $img_dir = @opendir($path) ) {
       while ( false !== ($img_file = readdir($img_dir)) ) {
           // can add checks for other image file types here
           if ( preg_match("/(\.gif|\.jpg)$/", $img_file) ) {
               $images[$ctr] = $img_file;
               $ctr++;
           }
       }
       closedir($img_dir);
       return $images;
   }    return false;
}
?> 

Code (markup):

 

very interesting thank you

 

Can this be used for other contextual ad services?

 

With a little modifications you can use it for anything, but this one is for rotating images in specified folder. Next to the image you can have whatever you want

 

Without sounding like a total newb..where exactly would i insert your script? what directory/file if it's not too much of a bother.

 

you just save it as something.php and then in your home page just call it with php include function