setcookie(name, value, expire, path, domain);
**
* 設置cookie
* n 名稱
* c 值
* e 有效期 0 默認 一個月 1 關閉立即失效
*/

function w_cookie($n, $c, $e = 0,$isdes=1)
{
if($isdes==1){$c=endes($c,deskey);}
$exp = time() + 3600 * 24 * 30;
if($e == 0)
{
setcookie($n, $c, $exp,"/");
}
else
{
setcookie($n, $c,0,"/");
}
}

//關閉cookie方法
w_cookie('bb', 'www.3ppt.com', $e = 0,$isdes=1);
<?php
function set_cronology($name,$value,$duration=7){
$duration=time()+(3600*24*$duration);
$max_stored_values=5;
if(isset($_cookie[$name])){
foreach($_cookie[$name] as $prop_crono=>$val_crono){
if($val_crono==$value)
return;
}
if($prop_crono<$max_stored_values)
setcookie($name.'['.($prop_crono+1).']',$value,$duration);
else{
array_shift($_cookie[$name]);
setcookie("$name[$max_stored_values]",$value,$duration);
}
}else
setcookie($name.'[0]',$value,$duration);
return;
}
?>