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get_post_taxonomies( int|WP_Post $post )

Retrieve all taxonomy names for the given post.

$post: (int|WP_Post) (Optional) Post ID or WP_Post object. Default is global $post.

(string[]) An array of all taxonomy names for the given post.

function get_post_taxonomies( $post = 0 ) {
	$post = get_post( $post );

	return get_object_taxonomies( $post );
}

Uses	Description
wp-includes/taxonomy.php: get_object_taxonomies()	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.
wp-includes/post.php: get_post()	Retrieves post data given a post ID or post object.

Version	Description
2.5.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/get_post_taxonomies