WordPress at a glance
filter is not described

woocommerce_is_checkout filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_is_checkout', 'filter_function_name_9892' );
function filter_function_name_9892( $false ){
	// filter...

	return $false;
}
$false
-

Where the hook is called

is_checkout()
woocommerce_is_checkout
woocommerce/includes/wc-conditional-functions.php 112
return ( $page_id && is_page( $page_id ) ) || wc_post_content_has_shortcode( 'woocommerce_checkout' ) || apply_filters( 'woocommerce_is_checkout', false ) || Constants::is_defined( 'WOOCOMMERCE_CHECKOUT' );

Where in WP core the hook is used WooCommerce

Usage not found.