PHP实现随机页面跳转


< ?php
$url[0] = "http://www.itcao.com/";
$url[1] = "http://www.luluzu.com/ ";
$url[2] = "http://flyash.itcao.com/ ";
$url[3] = "http://smile.itcao.com/ ";
srand ((double)microtime()*1000000);
$randomnum = rand(0, count($url)-1);
header ("Location: $url[$randomnum]");
exit();
?>

srand ((double)microtime()*1000000);
取一个随机数种子，产生随机数用的
$randomnum = rand(0, count($url)-1);
产生一个0和url数量-1之间的随机数，也就是上面的地址数组的下标
header ("Location: $url[$randomnum]");
实现页面跳转