Summary of the cookie and session

	Cookies	Session
Storage location	stored in the browser	The real file exists on the server , K exists in browser
Security	Low, easy to forge	Higher security than cookies
Set up	Setcookie () function	Session_Start () after passing through PU Pass function operation
Available Storage type	Scalar type: int, float, char, bool, NULL	All types except Resources
Life cycle	Set by the third parameter such as: Setcookie (' School ', ' XTU ', Time () +15);	Set by php.ini file Session.cookie_lifetime Session.gc_maxlifetime
Valid path	Set by the fourth parameter Setcookie (' School ', ' Kefeng ', Time () +5, '/');	Depends on the valid path of the cookie PHP.ini can be configured in: session.cookie_path=/
Valid domain name	Set by the fifth parameter String ' www.example.com '	Depending on the valid domain name of the cookie PHP.ini can be configured in: session.cookie_domain=
Read	$_cookie["]	$_session["]
Destroyed	Setcookie (",", 0) Setcookie (",", Time ()-1)	Four methods of Destruction: 1. Destroy a unit: unset ($_session[' School '); 2. Overall Clearance: $_session = Array (); 3, the use of the overall elimination of functions: Session_unset (); 4, the boxes are not: Session_destory ()
Principle	Between the browser and the server The server in the data interaction Data is transmitted via HTTP headers To the browser next time Exchange Over HTTP headers to the server	Store k in this process (Number of browser-to-server (interactive) v is stored on the server In the process, the browser and the service The data that the service interacts with is K.

The above describes the cookie and session summary, including the aspects of the content, I hope the PHP tutorial interested in a friend helpful.

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