Learn PHP Programming

Master PHP programming from basics to advanced concepts with our comprehensive tutorial series. Perfect for beginners and web developers.

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Tutorial Contents
Getting Started
Fundamentals
Arrays & Control Flow
Functions
Web Development
Object-Oriented Programming
Advanced Topics

PHP Constants

Constants hold values that cannot be changed once defined.

Defining Constants

define()
<?php
define('SITE_NAME', 'MySite');
echo SITE_NAME;
?>
const keyword
<?php
class Config {
    public const VERSION = '1.0.0';
}
echo Config::VERSION;
?>

Explanation

  • define() creates global constants; const is used inside classes or namespaces.
  • Constants improve clarity and avoid accidental mutation of important values.
  • Access class constants with ClassName::CONST and avoid hard-coded strings.
Tip: Group configuration constants in a dedicated class or config file.
Keywords: define, const, immutability, class constants
Previous: Variables
Next: Data Types

Frequently Asked Questions

PHP is a server-side scripting language designed for web development. It powers over 75% of websites on the internet, including Facebook, Wikipedia, and WordPress. Learning PHP opens doors to web development careers and freelance opportunities.

No, PHP is beginner-friendly with simple syntax. However, basic understanding of HTML and CSS will be helpful since PHP is often used to create dynamic web pages.

With PHP, you can build dynamic websites, web applications, content management systems, e-commerce platforms, APIs, and much more. Popular platforms like WordPress, Drupal, and Magento are built with PHP.

Basic PHP can be learned in 2-4 weeks with consistent practice. To become proficient and learn advanced concepts like frameworks and best practices, it typically takes 3-6 months of regular learning and practice.

You need a web server (Apache/Nginx), PHP interpreter, and a database (MySQL). The easiest way is to install XAMPP, WAMP, or MAMP which includes all these tools. You'll also need a text editor like VS Code or PhpStorm.

Master PHP Programming with Our Comprehensive Tutorial

Our PHP programming tutorial is designed to take you from a complete beginner to an advanced PHP developer. Whether you're looking to build dynamic websites, create web applications, or start a career in web development, this tutorial series provides everything you need to succeed.

What You'll Learn

  • PHP fundamentals and syntax
  • Variables, data types, and operators
  • Control structures and loops
  • Functions and arrays
  • Object-oriented programming
  • Database integration with MySQL
  • Web forms and user input handling
  • Security best practices

PHP remains one of the most popular programming languages for web development, powering millions of websites worldwide. Our tutorial includes practical examples, real-world projects, and best practices to ensure you learn not just the syntax, but how to write clean, efficient, and secure PHP code.

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