Problems in PHP 5.3.28

Hi this is not a problem with PHP but with WP. You’re using a very old version of WordPress which I do not recommand.

But in this case I tried to convince the dev of the metabox (I’m using a framework now) to provide some gracious degradation with a fallback for wp_enqueue_media() which is a function added to the core in 3.5.0 but he does not want to and I kinda understand his point of view.

While I cannot provide a fallback for his very very old version I can show you how to solve it :

Open the file init.php on line 273 and replace wp_enqueue_media by :

wp_enqueue_script('media-upload');
wp_enqueue_script('thickbox');
wp_enqueue_style('thickbox');

That should do the trick.