Displaying Custom Field Array

Question

I know that this is such a basic question but I have very little Wordpress experience and was hoping I could get some help.

I have a plugin that creates Custom Post Types and Custom Fields. It does both of these things easily, but provides zero support, not even a forum. I created a meta box (meets_on) with three fields.

The first field I created is a multi-check box with day of the week options (called day) and options Sunday, Monday, Tuesday, etc.

The second field I created is a multi-check box with location options (called location) and lists all the options for cities.

The third field I created is a multi-check box with age range options (called age_range) and lists all the options for age range (18-24, 25-30, etc.)

I absolutely cannot figure out how in the world to get these fields to display either on a single post or in the archive loop. I've tried the Wordpress codex suggestions and other answers but nothing is working. Simply nothing displays. I've used get_post_meta, etc.

I just simply need a post to display what I've selected in the back-end; i.e., this group meets on Fridays, in Akron, with an age range of 18-24. From the admin panel, everything is perfect - but I can't get it to display the selections I've made as admin in a single post or category view.

I know this is a long post, but thanks so much for ANY help. I've spent hours trying to figure this out on my own.

Ashley

EDIT:

Here is my code from content.php. My theme basically has a bunch of if:else statements about what kind of entry it is: if is_page, if is_archive, id is_single and this is what I put in if is_single :

<div class="entry-content">
    <?php cyberchimps_featured_image(); ?>
        <?php the_content( __( 'Continue reading', 'cyberchimps' ) . ' <span class="meta-nav">&rarr;</span>' ); ?>
                        <?php $meta_data = get_post_meta($postid,'meets_on');
// var_dump($meta_data); // debugging
echo $meta_data['day']; ?>
        <?php wp_link_pages( array( 'before' => '<div class="page-links">' . __( 'Pages:', 'cyberchimps' ), 'after' => '</div>' ) ); ?>
    </div><!-- .entry-content -->

EDIT 2:

        <?php $postid = get_the_ID(); ?> 
     <?php 
     $meta_data = get_post_meta($postid,'meets_on');
// var_dump($meta_data); // debugging
echo $meta_data['day']; ?>

EDIT 3: This code solved the issue:

<?php
$meets_on = get_post_meta( $post->ID, 'meets_on', true ); 
foreach( $meets_on as $meet){
echo $meet['day'];
} ?>

Answer 1

echo get_post_meta($postid,'meta_key_name',true); is what you want if the plugin is storing data as individual keys in the post meta table. You may be dealing with an array of values though which would require something like:

$meta_data = get_post_meta($postid,'meta_key_name');
// var_dump($meta_data); // debugging
echo $meta_data['some_key'];
echo $meta_data['another_key'];

As you don't even name the plugin or provide a link to it (that I can see) it is hard to say more. The plugin may not even be saving data to post meta. I could be saving to the options table or to a table of its own creation.

Reference:

http://codex.wordpress.org/Function_Reference/get_post_meta