kanonji

<h4>Features</h4>
<ul>
<li>use parent template for child category.</li>
<li>use parent template for child page.</li>
</ul>
<p>If you have works category with some child categories as followings, you may want to use ‘category-works.php’ for all three child categories. You need to copy as ‘category-design.php’ and the rest in default template hierarchy. WP Use parent template patches the template hierarchy to use parent template for these child categories. And also pages too.</p>
<ul>
<li>example.com/works/design</li>
<li>example.com/works/illust</li>
<li>example.com/works/photo</li>
</ul>
<h4>Category template hierarchy</h4>
<ol>
<li>category-{slug}.php</li>
<li>category-{id}.php</li>
<li>category-{parent slug}.php //Add by WP Use parent template</li>
<li>category-{parent id}.php //Add by WP Use parent template</li>
<li>category.php</li>
<li>archive.php</li>
<li>index.php</li>
</ol>
<h4>Page template hierarchy</h4>
<ol>
<li>custom template file</li>
<li>page-{slug}.php</li>
<li>page-{id}.php</li>
<li>page-{parent slug}.php //Add by WP Use parent template</li>
<li>page-{parent id}.php //Add by WP Use parent template</li>
<li>page.php</li>
<li>index.php</li>
</ol>
<p>See following for WordPress default template hierarchy.<br />
https://codex.wordpress.org/Template_Hierarchy</p>
<h4>Notes</h4>
<ul>
<li>Able to use only one generation age template. ‘category-child.php’ is able to use as parent template for grandchild in the example of ‘example.com/parent/child/grandchild’.</li>
<li>You may need to change parent template to handle child data.</li>
</ul>


WP Use parent template

To use parent template for child categories or pages. This plugin patches template hierarchy. This plugin is for who create or customize themes.

lmbbox

<p>Allows child themes to use their template files before the parent theme’s template files.</p>


LMB^Box Child Theme Hierarchy

Allows child themes to use their template files before the parent theme's template files.

WP Use parent template vs LMB^Box Child Theme Hierarchy