这是你怎么做的。。。它相当广泛。我不知道这是不是最好的办法，但我就是这样解决的。代码中可能有几个错误。但这对我很有用。
这是一个非常具体的功能愿望。另一种方法是category.php-page做同样的事情（因为它基本上做同样的事情。
Generate a list of the pages that should be emitted from getting a category created
function generate_the_excluded_array() {
global $excluded_pages;
$excluded_pages = array(); // Add all pages with the search-template
$search_pages = get_pages(array(
\'meta_key\' => \'_wp_page_template\',
\'meta_value\' => \'page-search.php\'
));
$excluded_pages[] = get_option( \'page_on_front\' ); // Add home page
foreach($search_pages as $page){
// Add all pages that has the search-page-template activated
$excluded_pages[] = $page->ID;
}
}
add_action( \'after_setup_theme\', \'generate_the_excluded_array\' );
Upon save, - then get a list of all pages and iterate through them
function custom_set_category_on_cpt() {
global $page_category_mapping;
global $excluded_pages;
$local_excluded_pages = implode(\', \', $excluded_pages );
$pages_args = array(
\'sort_order\' => \'asc\',
\'sort_column\' => \'post_title\',
\'hierarchical\' => 1,
\'exclude\' => $local_excluded_pages,
\'include\' => \'\',
\'meta_key\' => \'\',
\'meta_value\' => \'\',
\'authors\' => \'\',
\'child_of\' => 0,
\'parent\' => 0,
\'exclude_tree\' => \'\',
\'number\' => \'\',
\'offset\' => 0,
\'post_type\' => \'page\',
\'post_status\' => \'publish\'
);
$pages = get_pages( $pages_args );
foreach( $pages as $page ){
custom_create_category_and_check_for_page_children( $page, 0 );
}
purge_categories(); // A function for deleting categories that don\'t have a corresponding page.
}
add_action( \'save_post\', \'custom_set_category_on_cpt\' );
A function for purging the categories
function purge_categories( $page_category_mapping_) {
global $page_category_mapping;
$category_args = array(
\'hide_empty\' => 0,
\'exclude\' => array(1),
);
$categories = get_categories( $category_args );
foreach($categories as $category){
$category_args = array(
\'name\' => $category->name,
\'hide_empty\' => false,
\'parent\' => $category->category_parent
);
$category_array = get_terms( \'category\', $category_args );
$page_ID_with_corresponding_name = \'\';
foreach ( $page_category_mapping as $key => $val ) {
if( $category_array[0]->term_id === $val[ \'category_ID\' ] ){
$page_ID_with_corresponding_name = $key;
}
}
if( empty( $page_ID_with_corresponding_name ) ) {
wp_delete_category( $category_array[0]->term_id );
}
}
}
A function for determining if a page has children or not
function custom_page_has_children( $post_ID ) {
$children = get_pages( array( \'child_of\' => $post_ID ) );
if( count( $children ) == 0 ) {
return false;
} else {
return true;
}
}
一
function purge_categories( $page_category_mapping_) {
global $page_category_mapping;
$category_args = array(
\'hide_empty\' => 0,
\'exclude\' => array(1),
);
$categories = get_categories( $category_args );
foreach($categories as $category){
$category_args = array(
\'name\' => $category->name,
\'hide_empty\' => false,
\'parent\' => $category->category_parent
);
$category_array = get_terms( \'category\', $category_args );
$page_ID_with_corresponding_name = \'\';
foreach ( $page_category_mapping as $key => $val ) {
if( $category_array[0]->term_id === $val[ \'category_ID\' ] ){
$page_ID_with_corresponding_name = $key;
}
}
if( empty( $page_ID_with_corresponding_name ) ) {
wp_delete_category( $category_array[0]->term_id );
}
}
}
该功能的一部分是：function custom_create_category_for_page( $page ){
global $page_category_mapping;
if( $page->post_parent == 0 ){
$categorys_parents_ID = 0;
} else {
$categorys_parents_ID = $page_category_mapping[ $page->post_parent ][\'category_ID\'];
}
$category_args = array(
\'name\' => $page->post_title,
\'hide_empty\' => false,
\'parent\' => $categorys_parents_ID
);
$category_array = get_terms( \'category\', $category_args );
$category_ID = $category_array[0]->term_id;
if( empty( $category_array) ) {
$category_ID = wp_create_category( $page->post_title, $categorys_parents_ID );
}
if ( ! array_key_exists( $page->ID, $page_category_mapping ) ){
$page_category_mapping[ $page->ID ] = array(
\'category_ID\' => $category_ID,
\'category_parent_ID\' => $categorys_parents_ID
);
}
}
Creating a page-to-category-mapping, to be utilized other places
function build_page_category_mapping() {
global $excluded_pages;
$local_excluded_pages = implode(\', \', $excluded_pages );
// Initializing empty array
$page_category_mapping = array();
$pages_args = array(
\'sort_order\' => \'asc\',
\'sort_column\' => \'post_title\',
\'hierarchical\' => 1,
\'exclude\' => $local_excluded_pages,
\'include\' => \'\',
\'meta_key\' => \'\',
\'meta_value\' => \'\',
\'authors\' => \'\',
\'child_of\' => 0,
\'parent\' => - 1,
\'exclude_tree\' => \'\',
\'number\' => \'\',
\'offset\' => 0,
\'post_type\' => \'page\',
\'post_status\' => \'publish\'
);
$all_pages = get_pages( $pages_args );
foreach ( $all_pages as $page ) {
$page_ancestors_array = get_ancestors( $page->ID, \'page\', \'post_type\' );
$page_depth = count( $page_ancestors_array );
// GOOD FOR DEBUGGING
// echo \'<br /><br /><br /><br /><br />\';
// echo $page->post_title . \' is the post title<br />\';
// echo \'Depth: \' . $page_depth . \'<br />\';
if ( $page_depth == 0 ) {
$page_parent_ID = 0;
$page_parent_name = null;
$categorys_parents_ID = 0;
} elseif ( $page_depth == 1 ){
$page_parent_ID = $page_ancestors_array[0];
$page_parent_name = get_post( $page_parent_ID )->post_title;
$parent_category_args = array(
\'name\' => $page_parent_name,
\'hide_empty\' => false,
\'parent\' => 0
);
$categorys_parents= get_terms( \'category\', $parent_category_args );
$categorys_parents_ID = $categorys_parents[0]->term_id;
} else {
// Depth > 1
$page_ancestors_array = array_reverse( $page_ancestors_array );
// Two variables to determine how deep in the tree \'we\'ve gotten\'.
$pages_temp_topmost = -1;
$pages_temp_nextonedown = -1;
$page_parent_name = \'\';
$i = 0; // Iteration counter
$find_the_right_category_array = array(); // Array for the output (category ancestry).
foreach ( $page_ancestors_array as $ancestor ) {
if( $pages_temp_topmost === -1 && $pages_temp_nextonedown === -1 ){
$pages_temp_topmost = $ancestor;
$ancestor_category_args = array(
\'name\' => get_post( $ancestor )->post_title,
\'hide_empty\' => false,
\'parent\' => 0
);
$ancestor_category_array = get_terms( \'category\', $ancestor_category_args );
if( count( $ancestor_category_array ) == 1){
$find_the_right_category_array[ $i ] = $ancestor_category_array[0];
} else {
throw new Exception("Exception code: 1 - This shouldn\'t be possible, - but several categories was found with that parent and name");
}
} elseif ( $pages_temp_topmost != -1 && $pages_temp_nextonedown === -1 ) {
$pages_temp_nextonedown = $ancestor;
$temp_var = (int) ($i - 1);
$ancestor_category_args = array(
\'name\' => get_post( $ancestor )->post_title,
\'hide_empty\' => false,
\'parent\' => $find_the_right_category_array[ $temp_var ]->term_id
);
$ancestor_category_array = get_terms( \'category\', $ancestor_category_args );
if( count( $ancestor_category_array ) == 1){
$find_the_right_category_array[ $i ] = $ancestor_category_array[0];
} else {
throw new Exception("Exception code: 2 - This shouldn\'t be possible, - but several categories was found with that parent and name");
}
} else {
$temp_var = (int) ($i - 1);
$ancestor_category_args = array(
\'name\' => get_post( $ancestor )->post_title,
\'hide_empty\' => false,
\'parent\' => $find_the_right_category_array[ $temp_var ]->term_id
);
$ancestor_category_array = get_terms( \'category\', $ancestor_category_args );
if( count( $ancestor_category_array ) == 1){
$find_the_right_category_array[ $i ] = $ancestor_category_array[0];
} else {
throw new Exception("Exception code: 3 - This shouldn\'t be possible, - but several categories was found with that parent and name");
}
}
$i += 1;
}
end($find_the_right_category_array);
$key = key( $find_the_right_category_array );
$categorys_parents_ID = $find_the_right_category_array[ $key ]->term_id;
}
$category_args = array(
\'name\' => $page->post_title,
\'hide_empty\' => false,
\'parent\' => $categorys_parents_ID
);
$category_array = get_terms( \'category\', $category_args );
// Since that can only return one category, then we can do the following:
$category_ID = $category_array[0]->term_id;
// GOOD FOR DEBUGGING
// echo \'<pre>\';
// echo \'Page: \' . $page->ID . \' - with the name: \' . $page->post_title . \' <br />\';
// echo \'Pages parent \' . $page_parent_ID . \' - with the name: \' . $page_parent_name . \' <br />\';
// echo \'Category: \' . $category_ID . \' - with the name: \' . $page->post_title . \' <br />\';
// echo \'Categorys parent: \' . $categorys_parents_ID;
// echo \'</pre>\';
if ( ! array_key_exists( $page->ID, $page_category_mapping ) ){
$page_category_mapping[ $page->ID ] = array(
\'category_ID\' => $category_ID,
\'category_parent_ID\' => $categorys_parents_ID
);
}
}
return $page_category_mapping;
}
add_action( \'init\', \'build_page_category_mapping\' );
// This might be redundant, but I\'m not sure.
global $page_category_mapping;
$page_category_mapping = build_page_category_mapping();
我知道这是一个巨大的混乱。。。但这是我能做到的最好（唯一）方法。
