woocommerce_product_review_comment_form_args filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_product_review_comment_form_args', 'filter_function_name_4281' );
function filter_function_name_4281( $comment_form ){
	// filter...

	return $comment_form;
}

$comment_form

-

Where the hook is called

comment_form( apply_filters( 'woocommerce_product_review_comment_form_args', $comment_form ) );

Where in WP core the hook is used WooCommerce