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Hi.

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I'm Alena, and

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today I'm going to introduce you to
object oriented programming in PHP.

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PHP is a procedural language at its heart.

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In our previous PHP courses,

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we've mostly used procedural code in
our projects In procedural programming

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you specify a set of ordered steps needed
to implement the requested functionality.

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This can make our program easy to read,

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because we can just walk
through it step by step.

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However, as our code base grows,
can become harder and

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harder to remember everything we just
read, and how it all fits together.

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Organizing our code can help.

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We can group code that's
used multiple times

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into a function that can be
referenced throughout the program.

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We can also group our functions
into a single file so

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that we know where to find them.

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In addition, we can group functions
into separate files that are organized

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based on the functionality.

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For example, we could group all functions
that deal with math into one file.

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And all functions that deal with
products into another file.

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Object-oriented programming gives
us an even more powerful way

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to organize our code.

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Object-oriented programming lets us
group data, as well as functions,

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into a specific topic or
piece of functionality.

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If you've completed our PHP courses
on building a basic website,

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you've already been using objects.

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This course will help you
more fully understand

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the concepts involved in object
oriented programming and

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give you the skills you need
to create your own objects.

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Although the terms object and class
often appear to be used interchangeably,

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they are not the same thing.

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A class is like this instruction booklet.

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It tells us which pieces to use,
and how to put them together.

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The object is like this finished piece.

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To give you a clear understanding
of how to use objects and

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classes, we'll be creating
a cookbook full of recipes.

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Let's review the finished project.

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We'll create a cookbook collection
full of recipe objects,

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from there we'll be able
to perform some actions.

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We can display the recipe
titles from our cookbook.

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We can display a shopping
list of ingredients.

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Or we can display an individual recipe.

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By the end of this course you'll be able
to structure and utilize your own objects.

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After that, you'll be ready to launch
into more detailed explanations

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o the terminology and concepts
surrounding object-oriented programming.

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Once you dive into the concepts and
terminology,

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you'll really start to understand
the power of object-oriented programming.

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If at any time we hit a particular area
where you're struggling to follow along.

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Remember,you can always slow down or
speed up the playback of these videos.

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I also include more information
in the teacher's notes.

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So don't forget to check
those out as well.

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And finally, we have an awesome
community of fellow students

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who can help you through
a difficult section.

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Sometimes it just takes
another perspective and

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I'll be here to guide you through each
step of the way, so let's keep going.