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Module 1 – Introduction to API and HTTP

Module 2 – HTTP methods

Module 3 – HTTP status codes

Status codes overview
Status 200, 201 and 204
Status 400, 401, 403 and 404
Status 409, 422 and 429
Status 500 and server errors
Exercise: status codes

Module 4 – JSON in REST APIs

JSON format
json_encode in PHP
json_decode in PHP
JSON and UTF-8
JSON and dates
JSON and decimal numbers
Standard JSON response

Module 5 – REST API design

Designing endpoints
REST philosophy
Resources and URLs
API path antipatterns

Module 6 – PHP API project structure

api/index.php entry point
API router
API controllers
API models
Response helper
Error handler

Module 7 – CRUD operations

GET /users
GET /users/{id}
POST /users
PUT /users/{id}
DELETE /users/{id}

Module 8 – Data validation

Required field validation
Email validation
Number and date validation
Enum validation
Duplicate validation
Validation error responses
Validation in practice

Module 9 – JWT authentication

What is JWT
JWT header
JWT payload
JWT signature
Login and JWT token flow
JWT verification and expiry

Module 10 – Authorization and roles

Role-based authorization
Permission-based authorization
Authorization middleware
Admin role
User role
Guest role

Module 11 – Tokens and sessions

Access token
Refresh token
Logout and token blacklist
Refresh token in practice

Module 12 – API security

HTTPS and TLS
SQL injection in APIs
XSS in API context
Rate limiting
Brute force protection
CORS in REST APIs
API keys

Module 13 – API versioning

Versioning v1 and v2
Backward compatibility
Versioning strategy

Module 14 – Swagger and OpenAPI

OpenAPI and Swagger
Automatic Swagger documentation
Testing endpoints in Swagger

Module 15 – API testing

Testing with Postman
Testing with Bruno
Testing with Insomnia
Testing with curl
Test collections
Automated API tests

Module 16 – File uploads

Image upload
PDF upload
Word document upload
Multipart upload

Module 17 – Pagination

Pagination: page and limit
Pagination: sort and order
Pagination meta response
Pagination best practices

Module 18 – Filters

Basic filters
Advanced filters
Filters with query builder

Module 19 – Search

Search: q parameter
Field-based search
Fulltext search

Module 20 – API performance

Response caching
Gzip compression
ETag and conditional requests
Payload compression
Lazy loading relations

Module 21 – Logging

Error logging
Request logging
Logging IP and time
User-based logging
Log file structure

Module 22 – Third-party integrations

Integration: Stripe
Integration: PayPal
Integration: Google Maps
Integration: OpenAI
Integration: SMTP
Integration: SMS
Integration: ERP
Integration: SAP

Module 23 – Mobile API

Mobile API overview
Mobile login and token
Mobile refresh token
Mobile offline mode
Mobile API best practices

Module 24 – Deploy and production

Deploy on Apache
Deploy on Nginx
Deploy with HTTPS
Reverse proxy
Docker basics for API
Deploy on VPS

Module 25 – Final project

Final project: REST API

Module 26 – Bonus: OAuth2

OAuth2: Google and Microsoft

Module 27 – Bonus: Webhooks

Webhooks: Stripe, GitHub, Slack

Module 28 – Bonus: API Gateway

API Gateway: when and why

Module 29 – Bonus: HATEOAS

HATEOAS: is it needed

Module 30 – Bonus: Idempotency

Idempotent requests and retry

Module 31 – Bonus: Rate limit (Redis)

Rate limit with Redis

Module 32 – Bonus: Database versioning

Database and API versioning

Module 33 – Bonus: Monitoring

Monitoring: latency and errors

Module 26 – Bonus: OAuth2 Lesson

OAuth2: Google and Microsoft

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