Try replacing your shortcode function with following code: function rating_function() { if (function_exists(‘thumbs_rating_getlink’)) { $content = thumbs_rating_getlink(); } return $content; } add_shortcode(‘rating’, ‘rating_function’);
Calling a function from a link in WordPress
wp_insert_post hook not being called with wp_publish_post or wp_insert_post?
building custom simple shopping cart using wordpress plugin
install the Simple Lightbox and all images will automatically be shown in lightbox.. or you can have a look at this jquery lightbox. Lightbox
WordPress crashes when I click add new plugin
How to get rid of error message of custom metabox in dashboard when moving out of edit page?
Template redirect inside of plugin not redirecting
Saving custom form fields
The problem with your $item_info is that the variable is not initialized before your try to append to it. $item_info .= ‘String content’; is the exact same thing as $item_info = $item_info . ‘String content’;, so all you need is to check whether or not this variable exists: if (!isset($item_info)) { $item_info = ”; } … Read more