How to use checkbox with wpalchemy - php

Question

I have used following code to create a checkbox in WordPress pages (in admin section):
<?php while($mb->have_fields_and_multi('sidebar-block')): ?>
<?php $mb->the_group_open(); ?>
<!-- Some more code here for other fields -->
<p class="checkbox">
<input name="<?php $metabox->the_name('blue-block'); ?>" type="checkbox" value="1" <?php if ($metabox->get_the_value('blue-block')) echo ' checked="checked"'; ?>>
<label>Do not use Blue Block for content</label>
</p>
<?php $mb->the_group_close(); ?>
<?php endwhile; ?>
Above code is working fine. My question is how can i check if this checkbox is checked on the main website (frontend)?
Following is the code in my template for frontend:
<?php
$my_meta = get_post_meta($post->ID,'_sidebar_meta',TRUE);
if ($my_meta['sidebar-block']) {
foreach ($my_meta['sidebar-block'] as $sidebar)
{
?>
<div id="aside-blue">
<?php if ($sidebar['side_heading']) { ?>
<h2 class="sideheading"><?php echo $sidebar['side_heading']; ?></h2>
<?php } ?>
<?php echo apply_filters( 'the_content', $sidebar['side_content'] ); ?>
</div>
<?php } ?>
<?php } ?>
I want to add id="aside-blue" only when checkbox is checked.
i tried following code for this, but it's not working
<?php
$my_meta = get_post_meta($post->ID,'_sidebar_meta',TRUE);
if ($my_meta['sidebar-block']) {
foreach ($my_meta['sidebar-block'] as $sidebar)
{
?>
<div <?php if ($sidebar['blue-block'] == 'yes') { ?>id="aside-blue"<?php } ?>>
</div>
<?php } ?>
<?php } ?>

Answer 1

Check in the wp_postmeta table how the value is stored. When I used checkboxes, the values were serialized. You'll probably need to unserialize it before using the meta value.