PHP
Web DevelopmentPHP is a server-side scripting language used to generate dynamic web pages and power web applications. It runs on the web server, processes requests, interacts with databases, and outputs HTML, JSON, or other responses to the browser. PHP is commonly deployed with Apache or Nginx and is widely used in content management systems and custom sites where fast development and broad hosting support matter.
How It Works
PHP code executes on the server when a request targets a PHP script (for example, index.php). The web server passes the request to a PHP runtime (often PHP-FPM), which interprets the code, reads configuration, and can call libraries or frameworks. The script typically builds a response by combining templates with data, then returns rendered HTML or an API payload to the client.
In most hosting environments, PHP is paired with a database such as MySQL or MariaDB. A PHP application receives input (URLs, form data, cookies), validates it, queries or updates the database, and applies business logic before responding. Performance and stability depend on the PHP version, enabled extensions, memory limits, opcode caching (like OPcache), and process management settings in PHP-FPM.
Why It Matters for Web Hosting
Many popular site builders and applications require PHP, so hosting plans often differ in PHP versions, resource limits, and tooling. When comparing hosts, check whether you can select the PHP version per site, enable required extensions, adjust limits (memory, execution time, upload size), and use PHP-FPM and OPcache. These factors directly affect compatibility, security updates, and page speed for PHP-based sites.
Common Use Cases
- Running WordPress, Joomla, Drupal, and other PHP-based CMS platforms
- Building custom web applications with frameworks like Laravel or Symfony
- Creating REST APIs that output JSON for web and mobile clients
- Processing forms, authentication, sessions, and user dashboards
- Integrating with databases for catalogs, bookings, and membership sites
- Automating server-side tasks via cron jobs (reports, imports, cleanup)
PHP vs JavaScript (Node.js)
PHP is traditionally deployed as a request-driven server-side runtime behind a web server (often via PHP-FPM), making it a common fit for shared hosting and classic LAMP/LEMP stacks. Node.js runs JavaScript on the server and is frequently used for real-time features and long-lived connections. For hosting decisions, PHP typically offers broader low-friction support on standard plans, while Node.js may require specific platform support, process managers, and different deployment workflows.