替换没有插件的子页面的侧边栏

Question

I'm trying to get a different sidebar to load within child pages of a particular parent without the use of a plugin or setting up another template file.

This is what I have so far:

register_sidebars(1, array(
'name' => 'Other Sidebar',
'id' => "other-sidebar",
'before_widget' => '<li class="widget">',
'after_widget' => '</li>',
'before_title' => '<span class="widgettitle">',
'after_title' => '</span>'
));

if ( $post->post_parent == '1164' ) {
dynamic_sidebar( 'other-sidebar' );
}

But I'm wondering if I need use a filter of some sort to replace the default sidebar that is being loaded instead? Not too sure if that's correct or not.

Answer 1

Since you can edit the theme (or child theme) you could add a Page Template that would override the current page template with the custom sidebar you want.

<?php 
/*
Template Name: Custom Sidebar Page // All versions
Template Post Type: page // 4.7+ only
*/

// Page code here with the sidebar you want...
?>

<aside id="secondary" class="widget-area" role="complementary">
    <?php dynamic_sidebar( 'other-sidebar' ); ?>
</aside><!-- #secondary -->

Then, in the edit for your page and it's child pages, set this template as the one you want.