Display custom field only if value present?

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I am working on a creating a directory style page template that uses custom meta fields in WordPress that are used to generate up to 10 directory listings on a page.

The below code works very well for this purpose with one exception. If one of my directory pages only has 5 listings, the code is still displayed for listings 6-10 even if the values aren’t present. 

 <div class="listing"> 
 <h3 class="listing-title"><?php $values = get_post_custom_values("listing_heading_10"); 
 echo $values[0]; ?></h3> 
 <div class="listing-body">
 <p><?php $values = get_post_custom_values("listing_description_10"); echo $values[0]; ?>  </p> 
 </div><p class="listing-footer"><?php $values = get_post_custom_values("listing_url_10");    
 echo $values[0]; ?></p>

What do I need to add so code is only displayed if the custom meta fields are populated for that instance.

In other words I am looking for a rule that says:

If values are present then display
full directory listing (i.e.
listing_heading_10,
listing_description_10 &
listing_url_10)

If none of these values are present
then display nothing

Any help or advice on this would be greatly appreciated.

3 Answers
3

The easiest way would be to add a simple conditional:

$values = get_post_custom_values("listing_heading_10");

if ( $values ) { ?>
     <h3 class="listing-title"><?php echo $values[0]; ?></h3> 
<?php }

That said, is there any reason that you can’t put your output code in a foreach loop?

e.g.

$values = get_post_custom_values( 'some_value' );

foreach ( $values as $value ) {
     // echo output content here
}

It may be helpful to put your custom meta values into an array, to facilitate looping through them if they exist. So, instead of:

$values = get_post_custom_values("listing_heading_10")

…you could have:

$values get_post_custom_values( 'listing_heading' )

And instead of

$values

…you could output:

$values[10]

etc.

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