To check a Page by ID for that Page or its direct descendants (sub/child pages)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // To check a Page by ID for that Page or its direct descendants (sub/child pages) | |
| function is_tree( $pid ) { // $pid = The ID of the page we're looking for pages underneath | |
| global $post; // load details about this page | |
| if( is_page() && ( $post->post_parent == $pid || is_page( $pid ) ) ) | |
| return true; // we're at the page or at a sub page | |
| else | |
| return false; // we're elsewhere | |
| } |
Usage: if ( is_tree( 645 ) ) {}
or to check by ID or slug or title:
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Child page conditional | |
| * @ Accept's page ID, page slug or page title as parameters | |
| */ | |
| function is_child( $parent = '' ) { | |
| global $post; | |
| $parent_obj = get_page( $post->post_parent, ARRAY_A ); | |
| $parent = (string) $parent; | |
| $parent_array = (array) $parent; | |
| if ( in_array( (string) $parent_obj['ID'], $parent_array ) ) { | |
| return true; | |
| } elseif ( in_array( (string) $parent_obj['post_title'], $parent_array ) ) { | |
| return true; | |
| } elseif ( in_array( (string) $parent_obj['post_name'], $parent_array ) ) { | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } |
Usage:
if ( is_child( 645 ) ) {} or if ( is_child( 'Services' ) ) {} or if ( is_child( 'our-services' ) ) {}
To check a Page by ID for that Page or any/all of its child pages (incl. grandchildren)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // To check a Page by ID and all its child Pages incl. grand children | |
| function is_tree( $pid ) { // $pid = The ID of the page we're looking for pages underneath | |
| global $post; // load details about this page | |
| $anc = get_post_ancestors( $post->ID ); | |
| foreach( $anc as $ancestor ) { | |
| if ( is_page() && $ancestor == $pid ) { | |
| return true; | |
| } | |
| } | |
| if ( is_page() && ( is_page ( $pid ) ) ) { | |
| return true; // we're at the page or at a sub page | |
| } | |
| else { | |
| return false; // we're elsewhere | |
| } | |
| } |
To check a Page by ID if it is an ancestor
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function is_ancestor( $post_id ) { | |
| global $wp_query; | |
| $ancestors = $wp_query->post->ancestors; | |
| if ( in_array( $post_id, $ancestors ) ) { | |
| $return = true; | |
| } else { | |
| $return = false; | |
| } | |
| return $return; | |
| } |
Sources:
https://css-tricks.com/snippets/wordpress/if-page-is-parent-or-child/
http://www.kevinleary.net/wordpress-is_child-for-advanced-navigation/
