Summary of cookies and Sessions

: This article mainly introduces the summary of cookies and Sessions. For more information about PHP tutorials, see.

	Cookie	Session
Storage location	Stored in a browser	Real files exist on the server , K exists in the browser
Security	Low, easy to forge	Higher than cookie security
Set	Setcookie () function	Session_start () Function operations
Storage type	Scalar type: int, float, char, bool, null	All types except resources
Lifecycle	Set through the third parameter For example, setcookie ('school ', 'xtu', time () + 15 );	Use the php. ini file to set Session. cookie_lifetime Session. gc_maxlifetime
Valid Path	Set through the fourth parameter Setcookie ('school ', 'kefeng', time () + 5 ,'/');	Depends on the valid cookie path Php. ini can be configured as follows: Session. cookie_path =/
Valid domain name	Set through the fifth parameter String'Www .example.com'	Depends on the valid domain name of the cookie Php. ini can be configured as follows: Session. cookie_domain =
Read	$ _ COOKIE ['']	$ _ SESSION ['']
Destroy	Setcookie (",", 0) Setcookie (",", time ()-1)	Four destruction methods: 1. destroy a unit: Unset ($ _ session ['school']); 2. Overall cleanup: $ _ Session = array (); 3. clear all functions: Session_unset (); 4. no boxes are needed: Session_destory ()
Principle	Between browsers and servers Server load balancer Data transmission through HTTP headers Next intercommunication with the browser Carry the HTTP header to the server	Store K in this process (Number of browsers to servers Data interaction) V is stored on the server In the process The data for server interaction is K.

The above section describes the summary of cookies and sessions, including related content, and hopes to help those who are interested in PHP tutorials.