We're starting the daily exercise program.

So let's create a new file and name it exercise.php.

Again, we need to start the file using the opening and closing php tags.

Like we did for unit converter let's add comments to document the steps needed for

this program.

First we need to store each exercise in a string variable,

then we'll need to create a variable containing the day of the week.

Then we'll use an if statement

to test for the day of the week.

And finally we'll display the corresponding exercise string.

So the first thing we need to do is store each exercise in a string.

So let's create our first string.

We'll call this $exercise1.

We're going to set this equal to a string.

You're probably expecting us to write a list of physical exercises.

While we could do that in the exact same way,

I thought it would be more fun to use programming exercises.

So for exercise one, let's use the first exercise we performed for this course.

Display hello world.

Now let's create six more exercises for the rest of the week.

I'm going to paste these in instead of typing them all out.

I'll put them in the teacher's notes for you as well, but

feel free to use any exercises you'd like.

Now that we have our exercises ready,

we need to create a variable containing the day of the week.

I'll call this Day.

This could be a string with a day name or just an integer for the day number.

I'm going to go with integer.

We could set the variable manually and we will for testing, but

we want this to be automated based on the actual day of the week.

PHP has another function we can use for this called date.

Date returns today's date in the format we specify in the parenthesis.

Passing in the upper case n within quotes

will give us the numeric representation of the day of the week.

One for Monday through seven for Sunday.

Let's var_dump day and run our script just to see.

As you can see it gives us the numeric representation of today's day of the week.

Today is Wednesday.

Great.

Now we can use that in an if statement to check the day of the week and

return a corresponding exercise.

If our day equals one.

If this is Monday.

Then we want to echo $exercise1.

Let's duplicate this for each day of the week

And then let's replace these numbers.

Okay, let's try this out.

It only displays the exercise that corresponds to that day of the week.

Convert kilograms to pounds we notice is exercise 3.

This is the third day of the week.

This works like we want, but by creating separate if statements,

we force PHP to evaluate each statement.

If the first statement is true, we know that the other statements must be false.

So let's combine these statements using the elseif.

Elseif day two,

elseif day three, day four, day five.

Day 6 and day 7.

Let's remove this far dump.

And run the script again.

Great now we see just the 1 exercise.

Let's change day just so we can see if this is actually working.

We'll change day manually to equal six.

And now let's run this code again.

We now see exercise six.

Month long string of the day.

Great job working with strings and creating your second program.

You've now used all the basic scalar type variables that PHP offers,

boolean, integer, float, and string.

You've also used many different operators to store, retrieve, and

manipulate the values in those variables.

You've also learned conditionals to tell the script how you want to use that data

and control the flow of your script.

Before you move on, try practicing some of the skills you've been learning.

Perform other conversions or mathematical computations.

Add a skill level to your exercises and

display an exercise by skill level as well as day.

Create a quote of the day or show a greeting based on the time of day.

In the final section of this course, we'll show how to work with PHP on a website so

that you can start sharing your newly learned skills with the world.