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Posts Tagged ‘rotator’

A Simple Banner Rotator Script

12 Comments | This entry was posted on Jan 02 2008

I'm in the coding mood today .
I cannot count how many times I've been asked to code a UBER simple banner rotator script.
These things are so simple, but if you don't know PHP it can be difficult to understand.

The script below has two variables:

$links = array(
"http://www.google.com",
"http://www.msn.com",
"http://forums.digitalpoint.com"
);
//add a new link for the banner to a new line in the same format as above

and:

$images = array(
"http://www.google.co.uk/intl/en_uk/images/logo.gif",
"http://stc.msn.com/br/hp/en-us/css/35/decoration/msn_b.gif",
"http://forums.digitalpoint.com/images/misc/dps_logo.gif"
);
//add a new image link for the banner to a new line in the same format as above

As you can see they match up. The first line for the $links variable is for a google image, the second is for a msn image etc.
Here is the full code:

<?php
session_start();

$links = array(
"http://www.google.com",
"http://www.msn.com",
"http://forums.digitalpoint.com"
);
//add a new link for the banner to a new line in the same format as above

$randnum = mt_rand(0,$count);

if ($randnum == $_SESSION['randnum'])
{
$randnum = mt_rand(0,$count);
}
$_SESSION['randnum'] = $randnum;
echo '<a href="'.$links[$randnum].'"><img style="border:none" src="'.$images[$randnum].'" /></a>';