WordPress at a glance
function is not described

WC_API_Coupons::get_coupon() public WC 2.1

Get the coupon for the given ID

{} It's a method of the class: WC_API_Coupons{}

Hooks from the method
Return

Array|WP_Error.

Usage

$WC_API_Coupons = new WC_API_Coupons();
$WC_API_Coupons->get_coupon( $id, $fields );
$id(int) (required)
the coupon ID
$fields(string)
fields to include in response

Changelog

Since 2.1 Introduced.

Code of WC_API_Coupons::get_coupon() WC 5.0.0

<?php
public function get_coupon( $id, $fields = null ) {
	$id = $this->validate_request( $id, 'shop_coupon', 'read' );

	if ( is_wp_error( $id ) ) {
		return $id;
	}

	$coupon = new WC_Coupon( $id );

	if ( 0 === $coupon->get_id() ) {
		throw new WC_API_Exception( 'woocommerce_api_invalid_coupon_id', __( 'Invalid coupon ID', 'woocommerce' ), 404 );
	}

	$coupon_data = array(
		'id'                           => $coupon->get_id(),
		'code'                         => $coupon->get_code(),
		'type'                         => $coupon->get_discount_type(),
		'created_at'                   => $this->server->format_datetime( $coupon->get_date_created() ? $coupon->get_date_created()->getTimestamp() : 0 ), // API gives UTC times.
		'updated_at'                   => $this->server->format_datetime( $coupon->get_date_modified() ? $coupon->get_date_modified()->getTimestamp() : 0 ), // API gives UTC times.
		'amount'                       => wc_format_decimal( $coupon->get_amount(), 2 ),
		'individual_use'               => $coupon->get_individual_use(),
		'product_ids'                  => array_map( 'absint', (array) $coupon->get_product_ids() ),
		'exclude_product_ids'          => array_map( 'absint', (array) $coupon->get_excluded_product_ids() ),
		'usage_limit'                  => $coupon->get_usage_limit() ? $coupon->get_usage_limit() : null,
		'usage_limit_per_user'         => $coupon->get_usage_limit_per_user() ? $coupon->get_usage_limit_per_user() : null,
		'limit_usage_to_x_items'       => (int) $coupon->get_limit_usage_to_x_items(),
		'usage_count'                  => (int) $coupon->get_usage_count(),
		'expiry_date'                  => $this->server->format_datetime( $coupon->get_date_expires() ? $coupon->get_date_expires()->getTimestamp() : 0 ), // API gives UTC times.
		'enable_free_shipping'         => $coupon->get_free_shipping(),
		'product_category_ids'         => array_map( 'absint', (array) $coupon->get_product_categories() ),
		'exclude_product_category_ids' => array_map( 'absint', (array) $coupon->get_excluded_product_categories() ),
		'exclude_sale_items'           => $coupon->get_exclude_sale_items(),
		'minimum_amount'               => wc_format_decimal( $coupon->get_minimum_amount(), 2 ),
		'customer_emails'              => $coupon->get_email_restrictions(),
	);

	return array( 'coupon' => apply_filters( 'woocommerce_api_coupon_response', $coupon_data, $coupon, $fields, $this->server ) );
}