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As we covered in the php basics course,

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a variable is a piece of code
that references some data.

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There are several types of variables.

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Throughout this course,
we'll be using strings, integers,

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meaning whole numbers, arrays,
and touch briefly on objects.

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The first one we'll be
using is a string variable.

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To change the title tag from page to page.

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Let's go back into the suggest.php file.

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Let's start by specifying the page
title for the suggest page.

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Right before this line where we include
the header, let's add a variable or

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page title.

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As a refresher, variables in PHP
are represented by a dollar sign

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followed by the name of the variable.

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Variable names are case sensitive.

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We can make up just about any
name we want for our variable.

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A valid variable name
starts with a letter or

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an underscore, followed by any number
of letters, numbers, or underscores.

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There's no predefined list of
variables we have to choose from.

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But it's good practice to make
your names descriptive so

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that your code is easier to read.

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Let's assign our variable page title,
a string value of suggest a media item.

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If we assign this value to the variable
in our code before we include header.php,

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then we can reference this
variable in that include file.

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Open header.php.

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Here we have the page title,

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where we've told it to simply
echo out the actual title.

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This is not very useful.

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Let's replace the string Personal Media
Library, with our variable, page title.

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Be sure to type the variable name exactly.

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Again, upper and
lowercase characters do matter.

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Save both files, and let's take
a look at suggest in our browser.

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When we refresh the page, notice how
the title on the tab has changed.

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Let's take a closer look at
what's happening in our code.

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When suggest.php first loads, our code
creates a variable named $pageTitle and

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assigns it a value of
"Suggest a Media Item".

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Then our code includes header.php.

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Which echos out the value in
that page title variable.

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Let's add the same variable with
different values to our other pages.

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Open catalog.php.

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And let's add this variable
right before I include

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page title equals Full catalog.

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Now lets go into index.php and
do the same thing.

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A new variable, page, title.

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And we'll assign this the value
of Personal Media Library.

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Now let's go back to our browser.

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As we click through the menu,
we can see our title changing as we go.

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By assigning a value to a variable
before the header file gets included,

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we can use the same PHP code for
all the pages but

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still give them unique values for
their title tags.