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php cookie&session notes, friends in need can refer to it.
**
COOKIE
**
1. Create cookies
setcookie(name,value,expire,path,domain); The setcookie function must be in front of the label;
eg: setcookie(user,"zhuyumin",time()+3600);
Meaning: Create a user cookie, assign the value to zhuyumin, and this cookie will expire in one hour.
2. Get the cookie value
COOKIEeg:_COOKIE["user"]; //Get the value of cookie user;
COOKIE;//Get the values of all cookies. 3. Determine whether cookieisset has been set (_COOKIE["user"]));
4. Delete cookies
Set the cookie's expire to the value of the past time.
eg:setcookie(“user”, “”, time()-3600);
**
SESSION
*
php session variable is used to store information about the user session, or to change the settings of the user session. The information held by the Session variable is single-user and available to all pages in the application.
The working mechanism of Session is to create a unique ID (UID) for each visitor and store variables based on this UID. The UID is stored in a cookie or via the URL.
guide.
Start session: session_start(); used in front of label;
Save session:$_SESSION("");
Terminate session
unset() ;
session_destroy() function deletes all saved session data.
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