filter stuff from wordpress search results

Filter pages or content from WordPress search

/**
 * Exclude a page and children pages from wp search by making an array
 * of page id's starting wtih 2927 == id (can't use page slugs)
 */
add_filter( 'pre_get_posts', 'filter_the_search' );
function filter_the_search( $query ) {

	if ( $query->is_search ) {

		$pages = array( 2927 ); // parent page ID

		foreach( $pages as $page ) {
			$childrens = get_pages( array( 'child_of' => $page, 'echo' => 0 ) );
		}

		for( $i = 0; $i < sizeof( $childrens ); ++$i ) {
			$pages[] = $childrens[$i]->ID;
		}

		$query->set( 'post__not_in', $pages );

	}

	return $query;

}


/**
 * example limit to ..
 */
add_filter( 'pre_get_posts','filter_the_search' );
function filter_the_search( $query ) {
    
    if ( $query->is_search ) {
        $query->set( 'pagename', 'this-page,that-page,contact' );
    }
    
    return $query;
}

for sub pages we should be able to use post_parent (int)