PHP

PHP is the most widely used server-side programming language for web development. It powers over 75% of websites with a known server-side language, including WordPress, Joomla, Drupal, Magento, Laravel, and virtually every web hosting control panel. For the hosting industry, PHP is not just a language but the foundational runtime that most customer applications depend on.

Modern PHP (versions 8.0 through 8.4) has evolved dramatically from its earlier reputation. PHP 8 introduced JIT (Just-In-Time) compilation for significant performance improvements, named arguments, attributes, union types, match expressions, and fibers for lightweight concurrency. Each minor release brings performance gains, new features, and security improvements.

For hosting providers, PHP version management is a critical operational concern. Different customer applications require different PHP versions. WordPress may work on PHP 8.2 while an older application needs PHP 7.4. Hosting platforms solve this through multi-version PHP installations where each account can select their PHP version independently.

CloudLinux PHP Selector allows per-account PHP version selection from 5.x through 8.x on shared hosting. cPanel's MultiPHP Manager provides a similar capability. These tools let hosting customers switch PHP versions through their control panel without affecting other accounts on the same server.

PHP-FPM (FastCGI Process Manager) is the standard method for running PHP on modern hosting servers. It provides per-pool configuration (allowing per-account resource limits), process management with adaptive spawning, and significantly better performance than older CGI/suPHP methods. Both Nginx and Apache (via mod_proxy_fcgi) work with PHP-FPM.

OPcache, included with PHP since version 5.5, caches compiled PHP bytecode in shared memory, eliminating the need to parse and compile scripts on every request. Properly configured OPcache can improve PHP application performance by 2-3x. Hosting providers typically enable OPcache by default and allow customers to configure it through their hosting panel.