Introduction to PHP

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PHP language tutorial helps you to understand the PHP language for beginners, as well as professionals.


PHP language tutorial explained with simple programs.


Each topic explained with a simple diagram for better understanding.

php-introduction

What is PHP?

PHP stands for Hypertext Preprocessor. A server-side scripting language designed specifically for web development is PHP.

 

HTML contains PHP which runs on the server to create dynamic web content which gets delivered to the client’s browser.

 

Key Features of PHP

  • Open-source and free to use
  • Server-side execution for dynamic web content
  • Can interact with databases (like MySQL, PostgreSQL)
  • PHP enables developers to handle files read and write operations while processing form data and managing user sessions.
  • Cross-platform: works on Windows, macOS, and Linux
  • Extensible with many frameworks (Laravel, Symfony, CodeIgniter)

How PHP Works

  • A user submits their request to a PHP page through their web browser.
  • The PHP engine running on the server executes the script
  • The server delivers rendered HTML content to the browser instead of PHP code.

Syntax

<!DOCTYPE html>
<html>
<body>
<?php
    // This is a PHP comment
    echo "Hello, World!";
?>
</body>
</html>
Run ›
notepad

PHP code starts with <?php and ends with ?>

Statements are terminated with a semicolon ;

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