get_object_taxonomies( array|string|WP_Post $object, string $output = 'names' )

Return the names or objects of the taxonomies which are registered for the requested object or object type, such as a post object or post type name.

Description

Example:

$taxonomies = get_object_taxonomies( 'post' );

This results in:

Array( 'category', 'post_tag' )

Parameters

$object

(Required) Name of the type of taxonomy object, or an object (row from posts)

$output

(Optional) The type of output to return in the array. Accepts either taxonomy 'names' or 'objects'. Default 'names'.

Default value: 'names'

Return

(array) The names of all taxonomy of $object_type.

Source

File: wp-includes/taxonomy.php 

function get_object_taxonomies( $object, $output = 'names' ) {
	global $wp_taxonomies;

	if ( is_object($object) ) {
		if ( $object->post_type == 'attachment' )
			return get_attachment_taxonomies( $object, $output );
		$object = $object->post_type;
	}

	$object = (array) $object;

	$taxonomies = array();
	foreach ( (array) $wp_taxonomies as $tax_name => $tax_obj ) {
		if ( array_intersect($object, (array) $tax_obj->object_type) ) {
			if ( 'names' == $output )
				$taxonomies[] = $tax_name;
			else
				$taxonomies[ $tax_name ] = $tax_obj;
		}
	}

	return $taxonomies;
}

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Related

Used By

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Get the link relations available for the post and current user.
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Retrieves the post’s schema, conforming to JSON Schema.
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Retrieve Link Description Objects that should be added to the Schema for the posts collection.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::get_collection_params()

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wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php: WP_REST_Post_Types_Controller::prepare_item_for_response()

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wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::get_items()

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Update the custom taxonomies’ term counts when a post’s status is changed.
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Removes the taxonomy relationship to terms from the cache.
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Changelog

Changelog
Version Description
WP-2.3.0 Introduced.