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I’m designing a site for a client and I’m using custom fields for buy links to her books. I only want buy buttons to appear for fields that contain a URL, so I’ve hooked this just below the_content:

<?php if( get_field('kindle') ): ?>
           <a href="<?php the_field('kindle'); ?>"><img src="url.com"></a><?php endif; ?>

<?php if( get_field('nook') ): ?>
           <a href="<?php the_field('nook'); ?>"><img src="url.com"></a><?php endif; ?>

This code works perfectly but I would like to be able to customize the position of the buy links a little more. I thought of creating a shortcode to insert into the content of the post, but while I can create one that includes just text, when I put the above code into the shortcode.php file, it breaks.

This is the code I'm using for shortcode.php:

function buy_links(){

<?php if( get_field('kindle') ): ?>
               <a href="<?php the_field('kindle'); ?>"><img src="url.com></a><?php endif; ?>

<?php if( get_field('nook') ): ?>
               <a href="<?php the_field('nook'); ?>"><img src="url.com></a><?php endif; ?>

<?php if( get_field('kobo') ): ?>
               <a href="<?php the_field('kobo'); ?>"><img src="url.com></a>
<?php endif; ?>

<?php if( get_field('itunes') ): ?>
               <a href="<?php the_field('itunes'); ?>"><img src="url.com></a>
<?php endif; ?>

}// End buy_links()

share|improve this question
possible duplicate of short code output too early – Milo Apr 30 '14 at 16:13
Why hardcode URL's into your function? – Brad Dalton Apr 30 '14 at 17:07
Only because I'm testing right now. It will all be relative links once I know it's working – CissyH Apr 30 '14 at 17:14
@CissyH In which shortcode.php file did you place this code? It is enough if you place it in functions.php and call the function with add_shortcode( 'buylinks', 'buy_links' );. Then you can use the shortcode [buylinks] anywhere in the post. Also "assign" the HTML code to a variable and return it at the end of the function. – A.Jesin Apr 30 '14 at 18:00
I created a buylinks_shortcode.php file and referenced it in functions.php I thought it might be cleaner in the long run, but either would work just as well I think. Thanks! – CissyH Apr 30 '14 at 19:16

I thought of creating a shortcode to insert into the content of the post, but while I can create one that includes just text, when I put the above code into the shortcode.php file, it breaks.

Your code outputs data to the screen. You can't do that with filters like the_content. You need to concatenate a string and return it. Something like:

function the_content_cb($content) {
  $str = '';
  if( get_field('kindle') ) {
    $str .= '<a href="'.get_field('kindle').'"><img src="url.com"></a>';

  if( get_field('nook') ) {
    $str .= '<a href="'.get_field('nook').'"><img src="url.com"></a>';
  return $content.$str;

Note: the_field() is a plugin function-- Advanced Custom Fields--, as is get_field().

share|improve this answer
Thanks for responding! That is getting me much closer. The code isn't breaking the site, but it's not displaying anything either. I tried looking up get_the_field and I'm not finding anything outside ACF (which I am using). I did find this on a blog discussing how to use custom fields conditionally. Does it tell you anything? // display an image based on custom-field value, if it exists <?php $image = get_post_meta($post->ID, 'url', true); if($image) : ?> <img src="<?php echo $image; ?>" alt="" /> <?php endif; ?> Thanks again for your help. – CissyH Apr 30 '14 at 17:14
The correct ACF function is get_field. – Milo Apr 30 '14 at 17:20
Okay!! The code works with a href="'.get_field Thank you both so much. You saved my head from exploding right off my shoulders. Way too many hours working on this :) – CissyH Apr 30 '14 at 18:58
Will edit that. Thanks, @Milo. – s_ha_dum Apr 30 '14 at 19:02

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