Microsoft Word - Core PHP Programming Using PHP to Build Dynamic Web Sites

Listing 15.12 Random Banner Ad

<?
//Seed the generator
mt_srand(doubleval(microtime()) * 100000000);

//choose banner
switch(mt_rand(1,3))
{
case 1:
$bannerURL =
"http://www.leonatkinson.com/random/";
$bannerImage = "leon.jpg";
break;
case 2:
$bannerURL = "http://www.php.net/";
$bannerImage = "php_lang.jpg";
break;
default:
$bannerURL = "http://www.phptr.com/";
$bannerImage = "phptr.jpg";
}
//display banner
print("<A HREF=\"$bannerURL\">");
print("<IMG SRC= \"$bannerImage\" ");
print("WIDTH=\"400\" HEIGHT=\"148\" BORDER=\"0\"

");
print("");
?>