PHP NOTES

This repository contains PHP topics and their notes to learn from beginner level to advanced level.

Refer the below contents, To kick start the learning of important concepts in PHP for web application development. which gives you step by step approach to the concepts.
 

☰ CONTENTS

Fundamentals

1. Introduction:
   • What is PHP?
   • History and evolution
   • Role in Web Development
   • Benefits of Using PHP
2. Basic Syntax:
   • Variables
   • Data Types
   • Operators
3. Control flow:
   • If Else Statements
   • Nested If Else Statements
   • Switch Statements
4. Functions:
   • Function Definition
   • Function Calling
   • Function Arguments and Parameters
   • Function Return Values
   • Pass by Value
   • Pass by Reference
   • Scope of Variables
   • Variable Length Argument Lists
   • Anonymous Functions
   • Recursion
   • Variable Functions
   • Type Hinting
   • Return Type Declarations
   • Generators
   • Arrow Functions
   • String Functions
   • Mathematical Functions
   • Date and Time Functions
   • File and Directory Functions
   • Array Functions
   • Other Common Functions
5. Arrays:
   • Array Types
   • Indexed Array
   • Associative Array
   • Multi Dimensional Array
   • Choosing Array
   • Adding Elements in Array
   • Accessing Array Elements
   • Array Elements Unpack
   • Iterating Array Elements
   • Common Array Functions

Core PHP Concepts

1. Super globals:
   • GET Variable
   • POST Variable
   • REQUEST Variable
   • FILES Variable
   • SESSION Variable
   • COOKIE Variable
   • SERVER Variable
   • ENV Variable
2. Forms and Data Handling:
   • Creating Forms
   • Handling Forms
   • Processing Data
   • Input Validation
   • Input Sanitization
   • Filter Variable Flags
3. Sessions:
   • Need and Usage,
   • Creating Session,
   • Storing Data in Session,
   • Retrieving Data from Session,
   • Removing Session Data,
   • Destroying Session,
   • Pros,
   • Cons,
   • Functions Related To Session,
   • Constants Related To Session,
   • Configuration Flags Related To Session,
   • Different Session Handling Techniques,
   • Secure Session Handling,
   • Strong Session Name,
   • Session Handlers,
   • Example For Custom Session Handlers,
   • Protecting Against Session Fixation
4. Cookies:
   • Need and Usage,
   • Creating a cookie,
   • Modifying a cookie,
   • Deleting a cookie,
   • Pros,
   • Cons
5. File Handling:
   • Handling Directory,
   • Handling File,
   • Uploading a file,
   • Downloading a file,
   • File Handling Flags,
   • Common File Handling Functions,
   • Security Considerations
6. Error Handling and Debugging:
   • Identifying Errors,
   • Debugging Techniques,
   • Error Levels,
   • Log Levels,
   • Logging to a File,
   • Logging to a Database,
   • Error Logging Formats,
   • Key Points,
   • Log Rotation

Object-Oriented Programming in PHP

1. Classes and Objects:
   • Defining Classes,
   • Properties and Methods,
   • Creating Objects,
   • Object Destruction,
   • Key Points
2. Inheritance:
   • Extending Classes,
   • Overriding Methods,
   • Key Points
3. Polymorphism:
   • Method Overloading,
   • Method Overriding
4. Encapsulation:
   • Access Modifiers
     • Public,
     • Protected,
     • Private
5. Abstraction:
   • Abstract Classes,
   • Interfaces,
   • Traits,
   • Key Points,
   • Real World Usages

Database Integration

1. Database Abstraction Layers:
   • PDO,
   • Prepared Statements,
   • Positional and Parameterized Queries
2. PHP-MySQL Integration:
   • MySQL Overview,
   • Connecting to a MySQL Database,
   • Executing SQL Queries,
   • Updating and Deleting Data

Web Development with PHP

1. Web Frameworks:
   • Need of Framework in PHP,
   • Popular Frameworks
2. MVC Architecture:
   • Understanding MVC Architecture,
   • Building MVC,
   • How it works,
   • Advantages of MVC
3. Security Best Practices:
   • Common Web Attacks,
   • Protecting Applications

Advanced Topics

1. Regular Expressions:
   • Pattern Matching,
   • Find and Replacing Text,
   • Extracting Text,
   • Validate Text,
   • Common Patterns
2. XML and JSON:
   • Parsing XML,
   • Parsing JSON,
   • Generating XML,
   • Generating JSON,
   • Key Points
3. CLI with PHP:
   • Executing PHP Script in Command Line,
   • Accepting Command Line Arguments
4. Performance optimization:
   • Caching Techniques,
   • Code Optimization

By following this road map and consistently practicing, you can develop a strong foundation in PHP and build impressive web applications.

⚑ Contribution

Contributions are welcome! If you have any suggestions, bug reports, or feature requests, please open an issue or submit a pull request. Make sure to follow the existing coding style and provide clear documentation for your changes.

⚑ License

This reference licensed under the MIT license. Feel free to use, modify, and distribute it as per the terms of the license.

⚑ Contact

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