The History of PHP

To truly appreciate the quirks, features, and monumental success of PHP, it helps to understand its origins. Unlike languages designed in a strict academic vacuum, PHP was born out of sheer necessity and evolved organically alongside the growth of the World Wide Web.

Humble Beginnings: Personal Home Page Tools (1994)

In 1994, a Danish-Canadian programmer named Rasmus Lerdorf wrote a series of simple Common Gateway Interface (CGI) binaries in the C programming language.

He didn’t write them to change the world—he simply wanted a tool to maintain his personal homepage and track visitors viewing his online resume. He named this collection of scripts “Personal Home Page Tools”, or PHP Tools for short.

Over time, Rasmus added functionality to allow these tools to interact with databases and build simple forms. In 1995, he released the source code to the public so others could utilize it and fix bugs.

PHP/FI and The First Re-write (1997)

By 1997, the script had grown significantly. Two Israeli developers, Zeev Suraski and Andi Gutmans, recognized the potential of the tool but found the fundamental underlying architecture severely lacking for larger eCommerce projects.

They completely rewrote the core parser from scratch, creating PHP 3.0. During this period, the language dropped the “Personal Home Page” moniker in favor of a recursive acronym: PHP: Hypertext Preprocessor.

The Zend Engine Era (1999 - Present)

Following the overwhelming success of PHP 3, Andi and Zeev founded Zend Technologies and completely redesigned the core engine driving PHP (appropriately named the Zend Engine).

PHP 4.0 (2000)

Powered by the Zend Engine 1.0, this version brought massive performance improvements and support for a wider range of web servers, cementing PHP’s dominance over the web.

PHP 5.0 (2004)

A monumental shift for the language. PHP 5 introduced robust, strict Object-Oriented Programming (OOP) capabilities utilizing the Zend Engine II. This allowed for enterprise-level frameworks to finally be built in PHP.

The “Missing” PHP 6

Development of PHP 6 began with the intention of bringing native Unicode support to every string. However, implementing this feature at the core level caused significant performance degradation. The project was eventually abandoned, leading the community to jump straight to PHP 7 to avoid confusion with the failed PHP 6 branch.

PHP 7.0 (2015)

Driven by the threat of Facebook’s custom HHVM (HipHop Virtual Machine) engine, the PHP team launched PHP 7 utilizing the Zend Engine 3.0. The result? Almost double the speed of PHP 5.6 and a vastly reduced memory footprint. It also introduced scalar type declarations and strict typing.

PHP 8.0+ (2020 and Beyond)

The modern era of PHP. PHP 8 introduced the JIT (Just-In-Time) compiler, radically improving performance for mathematical and complex data tasks. It also brought modern features like named arguments, union types, and match expressions.

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Legacy Example

Despite evolving into a deeply typed OOP language, PHP has proudly retained its ability to easily output logic inside HTML files—exactly as Rasmus envisioned it in 1994!