The cookie key read in php is worth other information.

In php, it is worth reading other information by reading the cookie key. I want to add a password change function to set Cookiesetcookie (UserId, & nbsp; $ dataUser-& gt; rowid, 0, & nbsp;); setcookie (UserName, & nbsp; $ dataUser-& gt; username, 0, & nbsp;); & nb php reads the cookie key and deserves other information.
I want to add a function to change the password.
// Set Cookie
Setcookie ('userid', $ dataUser-> rowid, 0 ,'/');
Setcookie ('username', $ dataUser-> UserName, 0 ,'/');
Setcookie ('usertype', $ dataUser-> UserType, 0 ,'/');
Setcookie ('corpcode', $ dataUser-> CorpCode, 0 ,'/');
Then, how to obtain the password by reading the id value and comparing it with the original password ....
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$ _ COOKIE ['userid'];

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It seems that there are no errors, but you need to test it yourself to know.
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Setcookie ('userid', $ dataUser-> rowid, 0 ,'/');
$ DataUser-> passwd = $ dataUser-> find (array (''passwd' =? ', $ _ COOKIE ["UserID"]);
The Keys of the array are case sensitive.