wordpress调用未定义的函数

Question

On event I am loading a file in a page which should include a shortcode for a chat. The issue is that it says call to an undefined function. The shortcode is working fine on the same page, but when is loaded from a different file (same directory) it doesn't work.

I tried this:

<?php 
$file="/web/htdocs/.../home/wp-content/plugins/quick-chat";
plugin_dir_url($file); ?>

But it doesn't work...

Answer 1

Solved. It was a problem with that specific plugin who couldn't be called from other document. With other plugins it is working. Thanks!