PHP is one of the most popular and established web development languages, serving as a cornerstone for building dynamic websites and complex web applications. But how does PHP work, who is behind its development, and what are its core technical capabilities?

PHP’s development ecosystem relies on a collaborative effort between an active open-source community and enterprise technology providers:

• Documentation & Standards: Official standards, guidelines, and manuals are maintained by the PHP Documentation Group.
• Core Engine & Licensing: The core execution engine (Zend Engine) and commercial support services are managed by Zend Technologies.

Files containing PHP code use the .php file extension (for example: index.php).

• Key Takeaway: Unlike standard HTML files, PHP files cannot be opened or executed directly by a web browser.
• Server Execution: PHP scripts must be processed on a web server (such as Apache or Nginx) equipped with a PHP runtime environment before rendering the final HTML output.

• File Extension: .php
• MIME Type: text/php (Server recognizes the file as PHP)
• Dynamic Code Base: Page content can change on the fly based on user interaction or database queries.
• Scripting Language: Code is interpreted line-by-line on the server rather than requiring pre-compilation.
• Server-Side Runtime: Runs strictly on the server; only the processed result is sent to the client browser.
• Cross-Platform Compatibility: Supported operating systems include Linux/Unix, Windows, and macOS.

PHP blends concepts from several well-known programming languages and has, in turn, paved the way for newer technologies.

Which Languages Influenced PHP?
PHP’s syntax and design draw heavy inspiration from C / C++, Java, Perl, and Python. For this reason, PHP is easier to learn, especially for those who already know C-based languages.

Which Languages Did PHP Influence?
PHP’s widespread adoption influenced modern language developments such as Hack (a PHP-based language developed by Meta/Facebook) and Falcon.

PHP has undergone significant upgrades over the years. While historical versions like PHP 5.6 and PHP 7.2 marked major milestones in the language's development, modern applications today rely on PHP 8.x+, offering enhanced performance, Just-In-Time (JIT) compilation, and stricter type checking.