01. Introduction to DateTime

03. Modifying

04. Differences

05. Comparisons

06. Timezones

07. DateTime periods

08. Useful functions

09. Project: Human difference calculator

10. Hashing problems

11. Generating and checking hashes

12. Rehashing

13. Don't use mail()

14. PHPMailer: Basics

15. PHPMailer: SMTP

16. SMTP as a service

17. Basic HTML templates

18. Attaching files

19. Using an service API

20. What is JSON?

21. Decoding JSON + Hacker News example

22. Encoding JSON

23. Introduction and file_get_contents

24. cURL basics

25. POSTing with cURL

26. Using Guzzle

27. Project: Currency conversion API