Comprehensive Guide to Web Development Concepts and Technologies

Posted on Jun 30, 2024 in Computers

JavaScript

Objects

  • Data Representation and Management
  • User Interaction Handling
  • DOM Manipulation

Events

  • Click
  • Focus
  • Blur
  • Change
  • Mouseover

Frameworks

JavaScript frameworks provide pre-written code libraries for building web applications, simplifying development.

PHP

Built-in Functions

PHP offers a wide range of built-in functions for string manipulation, mathematical calculations, array operations, file handling, and more.

User-Defined Functions

  • Custom blocks of code for specific events
  • Start with the word “function”
  • Executed by a call to the function

Database (PHP7)

  1. Create a database connection
  2. Execute a query
  3. Process the results
  4. Close the connection

Style Sheets

Features

  • Font control
  • Text decoration
  • Backgrounds
  • Borders and margins
  • Positioning and layout

Classes

  • Define groups of HTML elements
  • Apply unique styling and formatting
  • Use class names and selectors

Regular Expressions

Regular expressions are patterns used for text search and replace operations.

Session

PHP sessions store and pass information temporarily, such as user credentials and cart information.

Cookies

  • Store login information
  • Remember preferences

External Style Sheet

An external style sheet is a separate file that stores website formatting rules, promoting consistency and easier maintenance.

Rules for Variables in PHP

  • Start with a dollar sign ($)
  • Follow with a valid name
  • Avoid reserved keywords

Client-Side Script

  • JavaScript: Widely used client-side scripting language
  • jQuery: Lightweight JavaScript library for simplified functionality

Animated Graphics

Animated graphics change position, size, or form over time, creating visual effects and simulations.

Embedding PHP in HTML

  • Using PHP script tags
  • Using server-side includes (SSI)

Drop-Down List

Use the and tags to create a drop-down list in HTML.

Creating Hyperlinks

Use the HTML tag with href and target attributes to create hyperlinks.

Duplicate Values

PHP code to find and display duplicate values in an array.