TAILIEUCHUNG - ICT 5 Web Development - Chapter 9: Maintaining state through multiple forms

ICT 5 Web Development - Chapter 9: Maintaining state through multiple forms presents What Are Multiple--Form Web Sessions? How to maintain the state through multiform? PHP Script, Receiving Hidden Fields in Web Sessions. | Vietnam and Japan Joint ICT HRD Program HTTP – stateless protocol HTTP is a stateless protocol Once a web server completes a client's request for a web page, the connection between the two goes away. There is no way for a server to recognize that a sequence of requests all originate from the same client. ICT 5 Web Development Chapter 9. Maintaining state through multiple forms Nguyen Thi Thu Trang trangntt@ 2 Example Multiple Screen Session What Are Multiple-Form Web Sessions? MultipleA multiple-form Web session leads the multipleuser through a series of HTML forms that work together and pass data from form to form. . – To build a shopping cart or on-line survey. on– To save user authentication information from page to page – To store persistent user preferences on a site 3 4 1 How to maintain the state through multiform? Content 1. Hidden fields 2. User browser cookies 3. PHP session Use tricks to keep track of state information between requests (session tracking) – Using hidden form fields – URL rewriting: every local URL on which the user might click is dynamically modified to include extra information – Using cookies: a bit of information that the server give to a client depends on the client – Using session 5 1. Hidden fields 6 A Full Script Example Hidden fields are part of HTML forms – Not displayed but value can be accessed in receiving script like any other variable. Consider an example script sets a hidden fi ld hidd field – Implements the Order Info form – on submit sends data to – Can still be viewed by user’s who view source. 7 8 2 PHP Script – The Output . 1. 2. 3. 4. 5. 6. 7. 8. Order Product p p p Hardware Product Order Form We have hammers, handsaws, and wrenches on special today! name="sample_hidden" Enter Enter Item: 9. Enter Quantity: maxlength="20" name="quantity"> 10. 12. The previous code can be executed .

• Quản trị Web
• ICT 5 Web Development
• Maintaining state through multiple forms
• Multiple Form Web Sessions
• The state through multiform
• PHP Script
• Receiving Hidden Fields in Web Sessions
• Introduction to Web Programming
• The Internet
• Uniform Resource Identifier
• World Wide Web
• Web site or Website
• Web Techniques
• Web Security
• Environment variables
• Setting Response Header
• Global arrays
• OOP in PHP
• Creating an Object
• Accessing attributes
• Building a classing
• Syntax to declare a Class
• Introduction to HTML
• Structured Document
• Document Object Model
• Common HTML Elements
• Nested Elements
• Introduction to PHP
• Publish PHP scripts
• PHP proper syntax
• PHP comments
• Alternative Comment Syntax
• PHP Variables
• HTML Input Forms PHP Variables
• Working with PHP String Variables
• HTML Input Forms
• Conditional Statements
• Using Conditional Test Statements
• Using Loops to Repeat Statements
• Conditional Test Statements
• Using the elseif Clause
• Functions Basic PHP Functions
• Write your own functions
• Using External Script Files
• The abs Functionabs
• The sqrt Function
• Working with Arrays Benefits of arrays
• Sequential arrays
• Multidimensional lists
• Creating Associative Arrays
• Using MySQL with PHP
• MySQL Overview
• Basic SQL commands
• Creating a table
• Updating data for a table
• PHP Advanced
• CardSystems Attack
• Normal Query
• Getting private info
• Different database engines
• PHP Frameworks
• Overview of Design Patterns
• MVC architecture
• Structure of a design pattern
• XHTML Overview
• XML Components
• XML Schema
• XML Validation
• XML Applications
• Using CSS
• Introduction to CSS
• Applying style rules Style class
• CSS box mode
• Useful properties
• Regular Expressions
• String functions
• Regular Expressio
• A Full Script
• Using grouping characters
• JavaScript Overview Window Controls
• Event Handlers
• AJAX Overview
• AJAX Implementation
• JS syntax basic