PHP Tutorials - Herong's Tutorial Examples

∟Sending and Receiving Cookies in PHP Scripts

This chapter provides tutorial examples and notes about cookie. Topics include understanding of the cookie concept; sending cookies with the setcookie() function; receiving cookies with the $_COOKIE array; enabling output buffering; creating persistent cookies; specifying cookie domain and path.

What Is a Cookie

Sending and Receiving Cookies

Sending and Receiving Cookies - Example

ob_start() - Output Buffering Function

Persistent Cookies Saved on Hard Disk

Other Cookie Properties - Domain and Path

Takeaways:

• setcookie() must be called before any output to the HTTP response. The main reason is that PHP is not buffering the HTTP response. But you can alter this behavior by using the ob_start() functions.
• A persistent cookie is stored in a cookie file on the browser's local machine.
• A persistent cookie can have an expiration time expressed in number of seconds since epoch.
• Web browser will only send back a cookie when both domain and path match the requested domain and path.
• To make a cookie available for all sub domains of a top level domain, set the domain property to the top level domain name.

Table of Contents

 About This Book

 Introduction and Installation of PHP

 PHP Script File Syntax

 PHP Data Types and Data Literals

 Variables, References, and Constants

 Expressions, Operations and Type Conversions

 Conditional Statements - "if" and "switch"

 Loop Statements - "while", "for", and "do ... while"

 Function Declaration, Arguments, and Return Values

 Arrays - Ordered Maps

 Interface with Operating System

 Introduction of Class and Object

 Integrating PHP with Apache Web Server

 Retrieving Information from HTTP Requests

 Creating and Managing Sessions in PHP Scripts

►Sending and Receiving Cookies in PHP Scripts

 Controlling HTTP Response Header Lines in PHP Scripts

 Managing File Upload

 Functions to Manage Directories, Files and Images

 Localization Overview of Web Applications

 Using Non-ASCII Characters in HTML Documents

 Using Non-ASCII Characters as PHP Script String Literals

 Receiving Non-ASCII Characters from Input Forms

 "mbstring" Extension and Non-ASCII Encoding Management

 Managing Non-ASCII Character Strings with MySQL Servers

 Configuring and Sending Out Emails

 Managing PHP Engine and Modules on macOS

 Managing PHP Engine and Modules on CentOS

 Archived Tutorials

 References

 Full Version in PDF/EPUB

Sending and Receiving Cookies in PHP Scripts - Updated in 2024, by Herong Yang