Returns false if goal is disabled

give-get-goal-fix.php

<?php
/**
 * Plugin Name: Give - <code>get_goal()</code> fix
 * Plugin URI: https://luminfire.com
 * Description: Forces <code>get_goal()</code> to return false if goal is disabled for the form.
 * Version: 1.0.0
 * Author: LuminFire (Andrew Minion)
 * Author URI: https://luminfire.com/
 *
 * @package  give-get-goal-fix
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Checks to see if goal is enabled and if not, returns false.
 *
 * @param string $goal    Goal amount.
 * @param int    $form_id Donation form ID.
 *
 * @return mixed          Goal amount or false.
 */
add_filter(
	'give_get_set_goal',
	function( $goal, $form_id ) {
		$goal_enabled = get_post_meta( $form_id, '_give_goal_option', true );
		if ( 'disabled' === $goal_enabled ) {
			return false;
		}

		return $goal;
	},
	10,
	2
);