Question:

(a) (i) Name four features of PHP that makes it an appropriate choice as a Web programming language.

(ii) List advantages while using PHP scripting language.

(b) Consider the following hyperlink:

< a href="welcome2.php?firstname=Kev&lastname=Yan" > Hi, I'm Kev Yan!
< /a>

Write down PHP extract codes that will retrieve and write the values of the query string parameters in a Web Page.

(c) Explain each of the following string functions. Illustrate your answer with simple examples.

(i) explode()
(ii) str_repeat()
(iii) str_replace().

(d) Write a switch statement that adds, subtracts, multiplies and divides variable x using the action variable.