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Currently, the collection
class is abstract and

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it implements the CollectionInterface.

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All methods from the interface are being
implemented in the collection class.

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Let's add one more method
to that interface.

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We'll call this public function getTitle.

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Now let's preview our site again.

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We get another error like we've
seen before because we have not

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implemented our required method.

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But let's take a closer
look at that error.

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First, notice that the error is on the
post class, not on the collection class.

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The next part of the error explains why.

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The abstract method must
either be implemented or

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the class itself may be declared abstract.

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Because the collection class is abstract.

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And therefore cannot be instantiated,

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it is not required to implement
all the required methods itself.

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Instead, this requirement is
passed to any non-abstract class,

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extending the collection class.

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Let's add this method to the post class.

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Public function getTitle.

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First, if this count is equal to 1,

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This means that we're
on a single post page.

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If we're on a single post page,
we want to return the current title.

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If we make it past this return,
we'll simply return Latest Posts.

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Let's clean up our pages.

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In header.php, in our views folder,
We used the title twice.

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Let's replace those with this new
method instead, content getTitle.

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Now we can remove the title
from the index page.

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Since we don't need to set the title,
we can make this a single if statement.

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So, if our content is not set or

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the content count is not equal to 1, or,

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The content current status
does not equal published.

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Then we will select all posts.

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Once again,

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let's preview the site to make sure
everything is still functioning properly.

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Looks good.

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We're ready to add
a second content type for

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pages by extending a second
child of the collection class.