How to use the Charitable_Campaign object. See https://github.com/Charitable/Charitable/blob/master/includes/campaigns/class-charitable-campaign.php for the class definition.

campaign-object-methods.php

<?php

// Get a campaign object for the campaign with ID 123. 
$campaign = charitable_get_campaign( 123 );

// Get the campaign end date.
$end_date = $campaign->get_end_date();

// Get the campaign end date, formatted like this: "9 January, 2017"
// You can use any valid PHP date format. See http://php.net/manual/en/function.date.php
$end_date = $campaign->get_end_date( 'j F, Y' );

// Get the amount of time left in a campaign.
$time_left = $campaign->get_time_left();

// Checks whether the campaign is endless (i.e. no expiry date).
$endless = $campaign->is_endless();

// Checks whether the campaign has ended.
$ended = $campaign->has_ended();

// Get the goal amount as a raw number.
$goal = $campaign->get_goal();

// Get the goal amount formatted according to your currency settings.
$formatted_goal = $campaign->get_monetary_goal();

// Checks if the campaign has a goal.
$has_goal = $campaign->has_goal();

// Checks if the campaign has achieved its goal.
$has_achieved_goal = $campaign->has_achieved_goal();

// Get the campaign status. 
// This is NOT the same as the post_status. For published campaigns,
// the campaign will either be 'active' or 'finished', depending
// on whether it has ended.
$status = $campaign->get_status();

// Get the amount donated to the campaign.
$amount = $campaign->get_donated_amount();

// Get the amount donated as a formatted string.
// For campaigns with a goal, the format is like this: "$10 donated of $50 goal"
// For campaigns without a goal, the format is like this: "$10 donated"
$summary = $campaign->get_donation_summary();

// Get the percentage raised.
// This gives you a formatted percentage like "55%".
$percent = $campaign->get_percent_donated();

// Get the percentage raised as a raw amount.
$percent_raw = $campaign->get_percent_donated_raw();

// Get the number of donors.
$donors = $campaign->get_donor_count();

// Get the collection of donations as an array.
$donations = $campaign->get_donations();