Write PHP scripts to illustrate the following:-
1. Display Current Month/Day /Date.
2. Change background color based on day of the week using if else statement.
3. Greet the user either by good Morning, Good Afternoon or good Evening after verifying the time.
4. Develop a web page for online course registration with the following details:
i. Name, age, Phone number, email ID : Text Box
ii. Country, Education : Drop Down Box
iii. Gender : Radio Button
And submit to the next page, which displays all the details of the registered candidate.
please can you write all these 4 questions in PHP script Program.