<?php
/* banner.php
This PHP3 scrolling program is designed by Anton Olsen (aolsen@graphweb.com), you can freely modify and use this program, and freely spread it, if you have a more important change to it, please write an e-mail.
In this program, the author tries to implement this function in a number of different ways, but the image function in PHP does not display the animated GIF image format and the operation of this format (e.g. fopen, Fpassthru, and Fclose). The author uses the PassThru method to implement it, although this is not the best approach, but it can be more quickly than other methods to display the advertising bar.
In this program, we assume that:
1, you already have a directory that holds all the advertising pictures.
2, all the advertising pictures are in GIF format.
3. All GIF images begin with banner.
3, in this directory there is no other than advertising pictures of the file.
Install this program:
1, put this program and all the advertising pictures (*. GIF) into a directory.
2, put the following HTML code on your Web page:
<a href= "wherever.you.want.com" >
</a>
4/14/2000 Mouse Chen (litmouse@km169.net) Translate it to Chinese
*/
/* Random ($max integer)
Returns a random number from 0 to $max-1;
*/
function Random ($max)
{
$x = rand ();
$y = Getrandmax ();
$r = $x/$y * ($max-1);
$r = Round ($r + +);
return $r;
}
/* Read the directory and read all the "banner*" files into an array;
$i = 0;
$d = Dir (".");
while ($entry = $d->read ())
if (substr ($entry, 0,6) = = "banner")
$array [$i + +] = $entry;
$d->close ();
/* Select a random number * *
$r = random ($i);
/* Send a No-cache and GIF file header, and output the picture. */
Header ("Pragma:no-cache");
Header ("Expires:monday 01-jan-80 12:00:00 GMT");
Header ("Content-type:image/gif");
PassThru ("Cat $array [$r]");
?>
