Retrieves the list of categories for a post.

Description

Compatibility layer for themes and plugins. Also an easy layer of abstraction away from the complexity of the taxonomy layer.

See also

• wp_get_object_terms()

Parameters

$post_idintoptional

The Post ID. Does not default to the ID of the global $post. Default 0.

$argsarrayoptional

Category query parameters.
See WP_Term_Query::__construct() for supported arguments.

Default:array()

Return

More Information

The results from wp_get_post_categories() aren’t cached which will result in a database call being made every time this function is called. Use this function with care. For performance, functions like get_the_category() should be used to return categories attached to a post.

Source

function wp_get_post_categories( $post_id = 0, $args = array() ) {
	$post_id = (int) $post_id;

	$defaults = array( 'fields' => 'ids' );
	$args     = wp_parse_args( $args, $defaults );

	$cats = wp_get_object_terms( $post_id, 'category', $args );
	return $cats;
}

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