php $ _COOKIE isset [英] php $_COOKIE isset

问题描述

我使用此代码设置一个cookie，然后查看它们是否存在

I am using this code to set a cookie and then see if they exist

setcookie("token", "value", time()+60*60*24*100, "/");
setcookie("secret", "value", time()+60*60*24*100, "/");
setcookie("key", "value", time()+60*60*24*100, "/");

if (!isset($_COOKIE['token']) || !isset($_COOKIE['secret']) || !isset($_COOKIE['key'])) {

// do something because one of the cookies were not set

}

即使所有三个cookie都在我的浏览器中设置，它仍然运行 if（）语句。通过消除过程我发现中间的cookie ！isset（$ _ COOKIE ['secret']）似乎导致 if code>语句运行，即使在我的浏览器中设置了cookie secret 。脚本说它没有设置，当我看着我的浏览器，它已经设置。

Even though all three of the cookies were set in my browser, it still runs the if() statement. Via the process of elimination I have discovered the middle cookie !isset($_COOKIE['secret']) seems to cause the if() statement to run even though the cookie secret was set in my browser. The script says it has not been set when I look at my browser and it has been set. Can you think of any reason why php is saying it wasn't set?

推荐答案

setcookie

setcookie only defines a cookie to be sent along with the rest of the HTTP headers, and they can be accessed on the next page load with the $_COOKIE. With your code, the HTTP headers are not be sent.

当您没有设定Cookie时，您只需要 setcookie 。喜欢：

You just need setcookie when a cookie is not set. Like:

if (!isset($_COOKIE['token'])) {
    setcookie("token", "value", time()+60*60*24*100, "/");
}

这篇关于php $ _COOKIE isset的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！