Cookies are small pieces of information that are stored in a browser. It keeps track of user preference, like what sites are visited, what keywords are used, among others.

The principle distinction amongst sessions and cookies is that sessions are put away on the server, and cookies are put away on the client's PCs in the content record position. Cookies can not hold various variables,But Session can hold numerous variables.We can set expiry for a cookie,The session just stays dynamic the length of the program is open.Users don't have admittance to the information you put away in Session,Since it is put away in the server. Session is mostly utilized for login/logout reason while cookies utilizing for client movement following.

The function setcookie() is used to define a cookie that is to be sent along with HTTP headers. The cookie must be sent prior to any output from the script as is the protocol restriction. After setting the cookies, they can be used when the next page is loaded by using $_COOKIE or $HTTP_COOKIE_VARS arrays.

The cookie settings include the enabling and disabling of the services that are used with the web browsers.

The following steps are taken to set the cookies:

- The TOOLS menu is being opened on web browser and the privacy tab is selected from where the privacy of individual user can be managed. 

- Using the ADVANCED tab the options to set the cookies will be visible and it will allow the overriding of cookie. 

- The cookies can be accepted by checking the first party cookies or the third party cookies. Out of these choices the first party cookies provide more security. 

- Check the checkbox for "Always allow session cookies" so that the session cookies can be maintained. 

- The web browser visits a website using the HTTP and then it keeps the track of the identity of the user visiting the web page.

- The cookies of HTTP get stored with the personal information of the user and it doesn’t accept the information. 

- Users accept the cookies as by rejecting all the cookies will load the web page in longer time and it will not be desired by the users. 

- Even if the cookie is being rejected a session cookie is being kept for use as it is the provision given to the web browser to use it. 

- The cookies gets stored temporary basis depending on the user of accepting or rejecting it and it basically saves the session so that the duration of the page load can be reduced.

The storage of cookies on the hard disk depends on OS and the browser. The Netscape navigator on Windows, the file cookies.txt contains all the cookies. The path is :

c:\Program Files\Netscape\Users\username\cookies.txt

The Internet Explorer stores the cookies on a file by name username@website.txt is

c:\Windows\Cookies\username@Website.txt