php设置和获取cookie
setcookie('mycookie','value');
//函数原型:int setcookie(string name,string value,int expire,string path,string domain,int secure)
echo($mycookie);
echo($HTTP_COOKIE_VARS['mycookie']);
echo($_COOKIE['mycookie']);
删除Cookie
(1)调用只带有name参数的setcookie();
(2)使失效时间为time()或time-1;
setcookie('mycookie');或setcookie('mycookie','');或setcookie("mycookie",false);
//setcookie('mycookie','',time()-3600);
echo($HTTP_COOKIE_VARS['mycookie']);
print_r($_COOKIE);
建议删除方法:
setcookie('mycookie','',time()-3600);
PHP提供一个很好用的函数mktime()。
你只要按顺序传送给mktime()你希望表示的小时,分钟,秒数,月份,日期,及年份,
mktime()就会返回该日期自1970年1月1日的总秒数。
因此,如果需要模拟 Y2K 问题:
$y2k = mktime(0,0,0,1,1,2000);
setcookie('name','value',$y2k);
setcookie('name', 'value', time+3600);
setcookie('name', 'value', $y2k, '~/myhome', '.domain.com');
获取COOKIE过期时间的办法
$expire = time() + 86400; // 设置24小时的有效期
setcookie ("var_name", "var_value", $expire); // 设置一个名字为var_name的cookie,并制定了有效期
setcookie ("var_name_expire", $expire, $expire); // 再将过期时间设置进cookie以便你能够知道var_name的过期时间
注:
在发送 cookie 时,cookie 的值会自动进行 URL 编码。接收时会进行 URL 解码。
如果你不需要这样,可以使用 setrawcookie() 代替。

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