Trying to display short code content in template file with do_shortcode()

Question

I installed the WP Issuu plugin on a site and tried to use do_shortcode() to render the shortcode in the template file. Strangely it doesn't work, although it does for the [gallery] shortcode.

I.e. this works:

echo do_shortcode('[gallery link=file]');

But this doesn't work:

echo do_shortcode('[issuu width=420 height=272 documentId=120118010023-8b7bf623bdd642d98252f310d62f1625]');

After some research, I found that this would work too:

echo apply_filters('the_content', '[issuu width=420 height=272 documentId=120118010023-8b7bf623bdd642d98252f310d62f1625]');

Any idea what's going on and how I can solve this? Thanks

Answer 1

WP Issuu plugin doesn't use the shortcode API. So you can't use it like a regular shortcode. The plugin is a filter for the_content, that's why your solution did work.

If you want to solve this (use do_shortcode) you have to rewrite the plugin so it uses the shortcode API.