Getting PHP warning when condition is false

[alokjain_luckyParticipant]

I have created custom meta box using WPAlchemy class  to add option for related posts.

Following code is working file in WP-Admin, and also in frontend only if i add related posts to the custom form created with meta box.

However if i leave this empty, i am getting following warning message

Warning: Illegal string offset ‘topics’ in /homepages/9/d416241127/htdocs/tw/u2me/wp-content/themes/u2me/single.php on line 37

Here line 37 is if ($my_meta['topics']) {

in other words i am getting warning message when this condition should return false.

——————————————————-
I have used following code to create custom meta:


<?php while($mb->have_fields_and_multi('topics')): ?>
<?php $mb->the_group_open(); ?>

<?php $mb->the_field('title'); ?>
<label>Title</label>
<p style="margin-top:0px;"><input type="text" name="<?php $mb->the_name(); ?>" value="<?php $mb->the_value(); ?>"/></p>

<?php $mb->the_field('link'); ?>
<label>URL</label>
<p style="margin-top:0px;"><input type="text" name="<?php $mb->the_name(); ?>" value="<?php $mb->the_value(); ?>"/></p>

<p><a href="#" class="dodelete button">Remove Topic</a></p>

<br/>

<?php $mb->the_group_close(); ?>
<?php endwhile; ?>


——————————————————-

and used following code in single.php to show the values stored using above code:

<?php

$my_meta = get_post_meta($post->ID,'_related_topics_meta',TRUE);

if ($my_meta['topics']) {

echo '<ul class="hero-subtitle">';

foreach ($my_meta['topics'] as $topic) {

?>

<li><a href="<?php echo $topic['link']; ?>"><?php echo $topic['title']; ?></a></li>

<?php     }

echo '</ul>';

} ?>
 

[alokjain_luckyParticipant]

I am getting formatting issues with code on this forum, maybe i am not posting it properly.

I have also posted same question here: http://stackoverflow.com/questions/14644352/getting-php-warning-when-condition-is-false

[Author]

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