Child Page Templates

Allows theme authors to include templates that will be automatically used based on the page’s parent.

For example, adding the file “page-123.php” to the “child-page-templates” folder in your theme directory will define the template for all pages that are children of the page with ID #123. You can also do the same thing with the post’s slug.

This template file will be used for all pages that are children of the page with ID #123:
/wp-content/themes/your-awesome-theme/child-page-templates/page-123.php

This template file will be used for all pages that are children of the page with the “team” slug:
/wp-content/themes/your-awesome-theme/child-page-templates/page-team.php