PHP is a versatile language that powers a wide range of web applications, from simple websites to complex enterprise systems. Here are some common types:
1. Dynamic Websites & CMS
- WordPress (blogs, business websites)
 - Joomla, Drupal (custom content management systems)
 - News portals, media websites
 
2. E-Commerce Platforms
- Online stores (WooCommerce, Magento, OpenCart)
 - Multi-vendor marketplaces (custom PHP solutions)
 - Payment gateway integrations (PayPal, Stripe)
 
3. Web Applications & SaaS Products
- CRM (Customer Relationship Management) systems
 - ERP (Enterprise Resource Planning) applications
 - SaaS platforms with subscription-based models
 
4. Social Networking & Community Platforms
- Social media websites (PHP was used in early Facebook development)
 - Forums & discussion boards (phpBB, vBulletin)
 - Dating and membership-based platforms
 
5. RESTful APIs & Backend Services
- APIs for mobile apps & third-party integrations
 - Backend services for AI-powered applications
 - IoT applications with data processing
 
6. E-Learning Platforms
- Learning Management Systems (Moodle, custom-built solutions)
 - Online course platforms with user authentication
 - Video streaming for education
 
7. Online Booking & Ticketing Systems
- Hotel & flight booking platforms
 - Event ticketing and reservation systems
 - Appointment scheduling apps
 
8. Financial & Banking Applications
- Online banking portals & payment systems
 - Invoice & billing management tools
 - Cryptocurrency exchange platforms
 
9. Healthcare & Telemedicine Applications
- Patient management systems
 - Online medical consultation portals
 - Electronic Health Record (EHR) systems
 
10. Business Automation & Enterprise Tools
- Inventory & warehouse management
 - HR & payroll systems
 - Helpdesk & support ticketing solutions