global $post;
$header_meta = get_post_meta($post->ID, 'page-header-meta', true);
if( isset( $header_meta ) ) {
echo '<h1>' . $header_meta . '</h1>';
}
else {
echo '<h1>Knowledgebase</h1>';
}
What this portion of code does is it checks the ‘page-header-meta’ value according to the page being displayed. IF your parent page has the metavalue set then the header will display. Similarly for the child pages also you need to set the meta value to display the particular header.
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