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Extending Object-Oriented PHP

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Extending a Child

6:12 with Alena Holligan

In this video we will extend the child class from ListingPremium. This new grandchild will inherit all the attributes and abilities of ListingPremium AND ListingBasic.

$object = new ListingFeatured();
//parent
echo is_a($object, 'ListingPremium'); //returns true
//grandparent
echo is_a($object, 'ListingBasic'); //returns true
//sibling of parent
echo is_a($object, 'ListingInactive'); //returns false

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    So let's copy the code from the ListingPremium and modify that. 0:00
    We don't need to change the allowed tags. 0:12
    We'll let the ListingPremium handle that, so let's remove that line. 0:14
    Now we can change description to code of conduct, or coc for short. 0:22

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