The is_post_type_hierarchical() WordPress PHP function determines if a post type is hierarchical.
Usage
is_post_type_hierarchical($post_type);
Example:
Input:
is_post_type_hierarchical('page');
Output:
true
Parameters
- $post_type (string): Required. The name of the post type.
More information
See WordPress Developer Resources: is_post_type_hierarchical()
Examples
Check if a custom post type is hierarchical
This example checks if a custom post type, ‘products’, is hierarchical.
if (is_post_type_hierarchical('products')) {
echo 'Products post type is hierarchical.';
} else {
echo 'Products post type is not hierarchical.';
}
Display hierarchical post types
This example displays the names of all registered hierarchical post types.
$post_types = get_post_types();
foreach ($post_types as $post_type) {
if (is_post_type_hierarchical($post_type)) {
echo $post_type . ' is hierarchical.<br>';
}
}
Check if the current post’s post type is hierarchical
This example checks if the post type of the current post in the loop is hierarchical.
global $post;
if (is_post_type_hierarchical($post->post_type)) {
echo 'The current post type is hierarchical.';
} else {
echo 'The current post type is not hierarchical.';
}
Display only non-hierarchical post types
This example displays the names of all registered non-hierarchical post types.
$post_types = get_post_types();
foreach ($post_types as $post_type) {
if (!is_post_type_hierarchical($post_type)) {
echo $post_type . ' is not hierarchical.<br>';
}
}
Check if post type exists and is hierarchical
This example checks if a post type exists and if it’s hierarchical.
$post_type_name = 'projects';
if (post_type_exists($post_type_name) && is_post_type_hierarchical($post_type_name)) {
echo 'The ' . $post_type_name . ' post type exists and is hierarchical.';
} else {
echo 'The ' . $post_type_name . ' post type either does not exist or is not hierarchical.';
}