WordPress Redirect Using the Value of a Variable

Hello everyone,

I’ve set up a WooCommerce product option to accept a URL from the user and I’m trying to output this URL to complete a redirect. Everything is fine except the redirect part. I need some insight on passing the value of a custom input into the wp_redirect() function. Any advice would be very much appreciated.

//* Add Redirect URL Field
add_action( 'woocommerce_product_options_general_product_data', 'rv_woo_add_custom_general_fields' );
function rv_woo_add_custom_general_fields() {
	global $woocommerce, $post;
	echo '<div class="options_group">';
	woocommerce_wp_text_input(
		array(
			'id'          => '_rv_woo_product_custom_redirect_url',
			'label'       => __( 'Redirect on Add to Cart', 'woocommerce' ),
			'placeholder' => 'https://',
			'desc_tip'    => 'true',
			'description' => __( 'Enter a URL to redirect the user to after this product is added to the cart.', 'woocommerce' )
		)
	);
	echo '</div>';
}

//* Save Redirect URL Field
add_action( 'woocommerce_process_product_meta', 'rv_woo_add_custom_general_fields_save' );
function rv_woo_add_custom_general_fields_save( $post_id ){
	$rv_woo_redirect_url = $_POST['_rv_woo_product_custom_redirect_url'];
	if( !empty( $rv_woo_redirect_url ) ) {
		update_post_meta( $post_id, '_rv_woo_product_custom_redirect_url', esc_url( $rv_woo_redirect_url ) );
	}
}

//* Redirect to URL
add_filter('add_to_cart_redirect', 'rv_redirect_elsewhere');
function rv_redirect_elsewhere() {
	$rv_woo_redirect_url = get_post_meta( get_the_ID(), _rv_woo_product_custom_redirect_url, true );
	if( !empty( $rv_woo_redirect_url ) ) {
		wp_redirect( $rv_woo_redirect_url );
		exit;
	}
}