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Sarabjit Kumar, Lovely Professional University Unit 10: Cookies

Unit 10: Cookies Notes

CONTENTS
Objectives

Introduction

10.1 Cookies
10.2 Setting Cookies

10.3 Deleting Cookies with PHP
10.4 Session Function Overview

10.4.1 Starting Session

10.4.2 Working with Session Variables
10.5 Destroying Session and Unsetting Variables

10.6 Summary
10.7 Keywords

10.8 Self Assessment Questions

10.9 Review Questions
10.10 Further Reading

Objectives

After studying this unit, you will be able to:
• Explain cookies.

• Discuss setting cookies.

• Discuss cookies with PHP.
• Understand session function overview.
• Explain destroying session and unsetting variables.

Introduction

A cookie is an information that a Web site puts on your hard disk so that it can remember
something about you at a later time. (More technically, it is an information for future use that
is stored by the server on the client side of a client/server communication.) Typically, a cookie
records your preferences when using a particular site. Using the Web’s Hypertext Transfer
Protocol (HTTP), each request for a Web page is independent of all other requests. For this
reason, the Web page server has no memory of what pages it has sent to a user previously or

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