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We created our first getter and
setter methods on the title property

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because we want to control
the incoming format.

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The next property in the class
is an array of ingredients.

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We could set this up as a simple
array of strings, these strings

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would be the full ingredients just
as you would see them in a recipe.

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Two cups flour, one egg, a cup and
a half of milk, and so on.

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This would work fine, if we just want
to print out a list of ingredients.

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It does make it harder to
control the format this way.

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Are we going to accept numbers
such as fractions, one-half,

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or decimals, like 0.5?

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It also makes it more difficult when
it comes to combining ingredients

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to make a shopping list, which is
something we'll be doing a little later.

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Instead of using a single string for

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each ingredient, we're going to set up
our ingredients as an associative array.

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This will allow us to break our
ingredients up into parts, and

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better control the formatting and
merging of items.

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Let's look at an example of
how the data will be stored.

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Each ingredient will be an array
with three keyed elements.

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Items such as flour.

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Amount, such as 2.5.

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And measurement, such as cup.

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We'll add more ingredients and

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each of these individual ingredients will
then be stored in a basic numbered array.

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Let's start adding the ingredients.

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Instead of just setting
the property all at once,

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we're going to add individual ingredients.

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So we'll use public
function addIngredient.

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This method will accept three arguments,

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item, amount and measure.

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Only the first item will be required.

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So we can add a default value of null
to both the amount and the measure.

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This will allow us to accept things like,
egg, one, without a measurement,

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or maybe lime to taste,
without an amount or a measurement.

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After accepting these three arguments,

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we want to add them to our
ingredients as an associative array.

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This ingredient, we'll add an element and

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our element will be an array.

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We'll have a key of item.

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And we'll set this to item.

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Our next key will be amount and
we'll set this to amount.

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And finally measure.

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We can also format these values
like using, UC words, on our item.

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We can also require that they pass
a float or an integer as the amount.

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Before setting this ingredient,

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we'll check if amount
is not equal null &&

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not is_float amount and

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not is_int amount.

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If we haven't passed a float or
an integer,

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then we want to exit our
script with a message.

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We can also add more information
about what they did pass.

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gettype,
tells us which type the amount is.

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We can also require that they
pass a valid measurement.

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To do this we have to first define which
measurements we're going to accept.

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To do this, we're going to
add another private property.

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Private because we don't want anything
to be able to change our measurements.

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We'll call these measurements and
we'll set it to an array.

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We want tsp, tbsp,

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cup, oz, pound,

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fluid ounce, pint,

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quart and gallon.

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You can change these however you want or
add other values.

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Now that we have defined the acceptable
measurements we can make sure that

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the measurement that
we passed in is valid.

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If measure is not equal

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to null and in_array,

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check measure in this

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measurements.

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Again, we want to exit our
script with a message.

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We can tell them which measurements
are valid by using implode.

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I also want to make sure that it's
checking the lowercase version of measure.

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str for string tolower.

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I also want to set the lowercase
version of measure.

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Let's see if we can get some errors.

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Let's addIngredient.

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Press egg and the word one and then dozen.

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Now let's run this script in the console.

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The amount must be
a float: string one given.

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Okay, great.

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Let's change this string to an int.

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Now let's try running it again.

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Undefined property.

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Let's look up here.

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This should be an s for measurements.

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Now let's run it again.

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Great, now we see please enter a valid
measurement with our list of measurements.

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We can now take off the measurement and
try it again.

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Great, no errors.

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But we don't have any way to
retrieve the ingredients yet.

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We need to add a new method.