PHP — The Web Scripting Language Powering Much of the Internet

What PHP Does

• Server-side scripting — embedded in HTML or standalone
• CLI execution — scripts, CLIs, cron jobs
• Built-in web server — php -S for dev
• Huge standard library — strings, arrays, HTTP, crypto, DB, JSON
• Frameworks — Laravel, Symfony, CodeIgniter, Phalcon, Yii
• CMS — WordPress, Drupal, Joomla, Magento
• ORM — Eloquent (Laravel), Doctrine (Symfony)
• Composer — Packagist is the largest PHP package registry
• JIT compiler — OPcache + JIT in PHP 8.0+
• Modern syntax — union types, enums, readonly, attributes, first-class callable

Architecture

Zend Engine interprets PHP bytecode. OPcache caches compiled bytecode between requests. PHP-FPM process manager serves requests behind Nginx or Apache. PHP 8 added a JIT tracing optimizer on top of OPcache for CPU-bound workloads.

Self-Hosting

# Production stack
# PHP-FPM + Nginx
apt install php8.3-fpm nginx
systemctl enable php8.3-fpm nginx

Key Features

• Embedded in HTML or standalone
• JIT compiler (8.0+)
• Union and intersection types
• Enums (8.1+)
• Readonly properties (8.1+) and readonly classes (8.2+)
• Attributes (metadata annotations)
• First-class callable syntax
• Composer package ecosystem
• Laravel and Symfony frameworks
• WordPress and many CMS

Comparison

FAQ

Q: Is PHP outdated? A: No. Modern PHP (8.x) has a type system, performance, and tooling close to other mainstream languages. WordPress-style CMSes still dominate PHP territory. The Laravel ecosystem is very healthy.

Q: PHP vs Python for web? A: PHP is irreplaceable on shared hosting and CMS scenarios; Python has clear advantages in ML/data. At the framework level, both are mature (Laravel vs Django/FastAPI).

Q: How fast is JIT? A: CPU-bound workloads improve significantly (2-3x); web IO-bound workloads improve little (bytecode is recompiled per request). OPcache is the real key to web performance.

Sources

• Docs: https://www.php.net/docs.php
• GitHub: https://github.com/php/php-src
• License: PHP License