1. Web Systems Development (CSC-215)
Lecture 3: Introducing PHP
Wednesday 7th February 2018

2. Functions User defined Inbuilt PHP function
An integer representation of time using Unix timestamp convention.

3. PHP Manual Reference

7. Using the function

9. Get date from 17 days ago

11. Variable Scope
Local variables, e.g., arguments to a function

12. Out of scope

14. Re-arranged

16. Or passed as argument
Longdate modified

18. Global Variables
Avoid unless absolutely necessary because its bad programming practice.

19. Static Variables

21. Static Variables
Only predetermined values allowed

22. Expressions

23. Booleans
TRUE & FALSE

26. Literals and Variables

27. Expressions and Statements

28. Operators

29. Precedence

30. Relational Operators

31. Identity Operator
Only 1 is printed

32. Not identical
Only 2 is printed

33. Conditionals

34. Conditionals

35. Conditionals

36. Switch
Default and break, as in C++

37. Loops

38. Loops

39. Loops

40. Class Activity
Print the current date and time as per the given formatting, and then print 9 future date and time values in 12 hour increments.
Maintain HTML formatting as well (h1 and p tags used).
Set the correct time zone for WampServer if needed.

41. Lecture content adapted from chapters 2 & 3 of Learning PHP, MySQL, JavaScript, CSS & HTML5, 3rd Edition, by Robin Nixon.