orm:knowledge-test 5.5. Test Your Knowledge: Questions

Question 5-1

What is the main benefit of using a function?

Question 5-2

How many values can a function return?

Question 5-3

What is the difference between accessing a variable by name and by reference?

Question 5-4

What is the meaning of “scope” in PHP?

Question 5-5

How can you incorporate one PHP file within another?

Question 5-6

How is an object different from a function?

Question 5-7

How do you create a new object in PHP?

Question 5-8

What syntax would you use to create a subclass from an existing one?

Question 5-9

How can you call an initializing piece of code when an object is created?

Question 5-10

Why is it a good idea to explicitly declare properties within a class?

See the section Section A.5 in Appendix A for the answers to these questions.