One, cookie
setcookie('userName','jack')//General setting cookie
setcookie('userSkill','jump',time()+1*60*60)//Set life cycle
二、session
1. Add, delete, modify and check session
session_start()
Set session
$_SESSION['Name']=array('Data 1','Data 2')
Get session
var_dump ($ _ SESSION)
Modify the session and re-assign directly
$_SESSION['Name']=array()
Delete session
unset($_SESSION['name'])
session_destroy()
2. Determine whether to log in
if(issset($_SESSION['isLogin'])){
//Logged in, you can come in
}else{
//No login, return to the login page
header('location:./02.login.html')
}