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The final part of logging
in is a log out system.

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We've already covered all of this,
so it should not be anything new.

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We need to create a do log out procedure.

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Let's close up the ink folder.

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DoLogout.php.

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Require,

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Inc/bootstrap.php.

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Now, we're going to set the bad cookie and
then redirect.

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Let's go to our function and
copy these two lines.

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Now, let's change our navigation and

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check if the user should see the log in or
log out.

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If not is authenticated,

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When we're breaking up our conditional
statement over multiple code blocks,

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it can be easier to follow if we use
a secondary format using a colon and,

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and if.

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We can also add an else for
our log out link.

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Procedures/doLogout.

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Because we're using the is authenticated
function in our navigation file, we'll

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need to add the bootstrap file to the rest
of our login and register pages as well.

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We also need to clean up our home page.

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We'll move the bootstrap file to the top.

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And remove this extra logged in code.

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Let's take a look at this in the browser.

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While we're logged in,
we see the link to log out.

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And when we log out, we see the links
to log in or register again.

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Also, when we click on the Add Book,
we get redirected to the log in page.