What is PHP?

Welcome to PHP Programming

PHP, which stands for "PHP: Hypertext Preprocessor" (a recursive acronym), is one of the most widely used server-side scripting languages in the world. Originally created by Rasmus Lerdorf in 1994 as a set of Common Gateway Interface (CGI) scripts to track visits to his online CV, PHP has evolved dramatically over the past three decades into a powerful, general-purpose programming language that powers a significant portion of the internet.

A Brief History of PHP

The first version of PHP was little more than a collection of C programs that generated HTML. By 1997, two Israeli developers, Andi Gutmans and Zeev Suraski, rewrote the parser from scratch, forming the basis of PHP 3. This was a turning point: PHP became a true programming language rather than a set of tools. Gutmans and Suraski went on to create the Zend Engine, which has powered PHP from version 4 onward.

PHP 5 (2004) introduced a proper object-oriented programming model, making it suitable for large-scale applications. PHP 7 (2015) brought massive performance improvements, often doubling the speed of PHP 5.6. The current major version, PHP 8, introduced features like the JIT (Just-In-Time) compiler, named arguments, union types, attributes, match expressions and fibers for asynchronous programming. PHP 8.x continues to modernise the language with each minor release.

How Server-Side Scripting Works

PHP is a server-side language, which means the code runs on the web server rather than in the user's browser. When a visitor requests a PHP page, the following happens:

1. The browser sends an HTTP request to the web server.
2. The web server recognises the .php file extension and passes the file to the PHP interpreter.
3. The PHP interpreter executes the code, which may query a database, process form data or perform calculations.
4. The interpreter generates HTML output and sends it back to the web server.
5. The web server delivers the HTML to the browser, which renders the page.

The visitor never sees the PHP source code. They only see the resulting HTML. This is fundamentally different from client-side languages like JavaScript, which run inside the browser and are visible to anyone who views the page source.

What Can You Build with PHP?

PHP is remarkably versatile. Here are the most common use cases:

• Content Management Systems: WordPress, the world's most popular CMS, is built entirely in PHP. It powers over 40% of all websites on the internet. Other PHP-based CMSs include Drupal and Joomla.
• E-commerce Platforms: WooCommerce (a WordPress plugin), Magento, PrestaShop and OpenCart are all PHP applications. If you have ever purchased something online, there is a good chance a PHP application processed part of that transaction.
• Web Frameworks: Laravel is one of the most popular web frameworks in any language. Symfony, CodeIgniter, CakePHP and Slim are also widely used. These frameworks provide structure, security features and developer tools that make building complex applications faster and safer.
• REST APIs: Modern PHP applications frequently serve as API backends, providing JSON data to frontend applications built with React, Vue or mobile apps.
• Web-based Admin Panels and Dashboards: Many businesses use PHP to build internal tools, reporting dashboards and administration interfaces.

PHP Compared to Other Languages

How does PHP compare to other popular web development languages?

• PHP vs JavaScript (Node.js): JavaScript can run on both the client and server, while PHP is server-only. PHP has a larger ecosystem of hosting providers and a lower barrier to entry for web hosting. Node.js tends to be preferred for real-time applications like chat systems.
• PHP vs Python: Python is more popular for data science and machine learning, while PHP dominates in traditional web development. PHP has more mature web hosting infrastructure and a larger selection of CMS platforms.
• PHP vs C#/.NET: C# with ASP.NET is common in enterprise environments, especially those using Microsoft infrastructure. PHP is more common in small to medium businesses and offers cheaper hosting options.

PHP in the South African Market

PHP holds a strong position in the South African tech industry. Many local businesses rely on WordPress websites, which creates consistent demand for PHP developers. The freelance market for WordPress customisation and plugin development is substantial across the country.

South African web agencies frequently use Laravel for client projects, from e-commerce stores to booking systems and corporate portals. Government departments and municipalities often run PHP-based websites. Local hosting providers like Afrihost, Hetzner South Africa and MWEB all offer affordable PHP hosting, making it accessible for small businesses and startups.

For developers entering the job market, PHP skills open doors to WordPress development, Laravel positions and full-stack web development roles. The combination of PHP with MySQL or PostgreSQL remains one of the most requested skill sets in South African job listings.

Why Learn PHP in 2026?

Despite the rise of newer technologies, PHP continues to thrive for several reasons: it has a massive existing codebase that needs maintenance and improvement, the WordPress ecosystem alone guarantees ongoing demand, modern PHP (version 8.x) is a genuinely pleasant language to work with, hosting is affordable and widely available and the community produces excellent documentation and learning resources. By learning PHP, you are investing in a skill that has immediate practical value in the job market.