PHP Fundamentals

Chapter 15: PHP Best Practices

15.1 Code Organization

• Use meaningful variable names
• Follow PSR coding standards
• Organize code into functions/classes
• Use namespaces

15.2 Security Practices

• Always validate and sanitize input
• Use prepared statements
• Protect against SQL injection
• Use HTTPS for sensitive data

15.3 Performance Optimization

• Use opcode caching (OPcache)
• Optimize database queries
• Minimize file includes
• Use appropriate data structures

Conclusion

PHP is a powerful language for web development. Master these fundamentals to build dynamic, secure web applications. Practice regularly and explore frameworks like Laravel for advanced development.