为什么反序列话没有输出?
<code>$tmp = array("zh"=>"中文"); setcookie("zh",serialize($tmp)); $g = $_COOKIE["zh"]; echo unserialize($g);</code>
请问下,为什么上述语句会没有输出,也就是说为什么反序列化会失败?
回复内容:
<code>$tmp = array("zh"=>"中文"); setcookie("zh",serialize($tmp)); $g = $_COOKIE["zh"]; echo unserialize($g);</code>
请问下,为什么上述语句会没有输出,也就是说为什么反序列化会失败?
谢邀。
代码里有语法错误,unserialize
反序列化之后是一个数组,而echo
数组只有语法错误的Notice: Array to string conversion
你是不是修改了报错等级,把 notice
错误等级屏蔽了,所以没有输出任何对象。
至于 cookie 的运行等等,可以参考其他人的答案
echo unserialize($g)['zh'];
要么你dump(unserialize($g))
set_cookie发出响应浏览器才会有cookie,也就是说下次请求才会在$_COOKIE中看出来
反序列化没有失败,因为cookie是伴随着http请求头访问服务器的,当前设置的cookie值只能等到下次访问页面才能打印。所以你这样是无法打印出来的
$_COOKIE是在HTTP/HTTPS请求后才能获取到的,$_COOKIE["zh"]现在是空的,当然不会有内容了。

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