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Summary PHP notes
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  • Course
  • CS8501
  • Institution
  • Anna University,CEG,chennai-600025

PHP notes provide a complete guide to mastering PHP, a popular server-side scripting language for web development. These notes cover essential topics such as PHP syntax, MySQL integration, object-oriented programming (OOP), form handling, session management, and security practices. Suitable for bot...

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Document information

  • September 30, 2024
  • 3
  • 2024/2025
  • Summary

Subjects

  • php notes
  • php programming notes
  • php tutorial notes
  • php study material
  • php learning resources
  • php syntax notes
  • php basics notes
  • php advanced notes
  • php crud operations notes
  • php revision notes

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  • Anna University,CEG,chennai-600025
  • CS8501
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PHP Programming Language Overview
1. Introduction to PHP

History of PHP: PHP (Hypertext Preprocessor) was originally created by Rasmus Lerdorf in 1994 as

a simple scripting language for web development.

Characteristics of PHP: PHP is a server-side scripting language designed primarily for web

development but also used as a general-purpose language. It is embedded in HTML to generate

dynamic web pages.

Structure of a PHP Program: PHP code is embedded within HTML using <?php and ?> tags, and

the script is executed on the server side.

2. Data Types and Variables in PHP

Basic Data Types: PHP supports data types like int (integer), float (floating-point), string (sequence

of characters), array (indexed collection), and boolean.

Variables: Variables in PHP are dynamically typed and start with the $ symbol. They are

case-sensitive and can store different types of data.

Constants and Literals: PHP constants are defined using the define() function, and literals represent

fixed values used directly in the code.

3. Operators in PHP

Arithmetic Operators: Includes +, -, *, /, % for performing basic arithmetic.

Relational Operators: Used to compare values, such as ==, !=, >, <.

Logical Operators: Logical operations include && (AND), || (OR), ! (NOT).

Assignment Operators: Assignment uses = to assign values, and other operators include +=, -=, *=,

etc.

4. Control Structures in PHP

if, if-else, and elseif statements: Used for conditional execution of code blocks.

switch-case statement: Provides a way to select one of many blocks of code based on the value of a

variable.

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