Title: Undefined Variable post
Last modified: August 30, 2016

---

# Undefined Variable post

 *  Resolved [zartgesotten](https://wordpress.org/support/users/wearitwell/)
 * (@wearitwell)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/undefined-variable-post-1/)
 * Hi there! I turned on debug mode to make sure everything was ok with my theme
   and plugins and I’m getting this:
 *     ```
       Notice: Undefined variable: post in /xxxx.php on line 62
       Notice: Trying to get property of non-object in /xxx.php on line 62
       ```
   
 * And this is what it says in those lines…
 *     ```
       // get taxonomies terms links
       function custom_taxonomies_terms_links(){
         // THIS is Line 62
         $post = get_post( $post->ID );
   
         // get post type by post
         $post_type = $post->post_type;
       ```
   
 * … and so on….;-)
 * Funny thing is : the function does what it is supposed to do but gives out these
   errors. Right now it’s all in the functions.php but I want to move it to its 
   own plugin. But first I want to get rid of these errors. Can anyone explain or
   help?
    Thank you very much! Anja

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [catacaustic](https://wordpress.org/support/users/catacaustic/)
 * (@catacaustic)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/undefined-variable-post-1/#post-6322047)
 * What it’s saying is that the `$post` variable doesn’t eixst inside your function
   when you try to access it. PHP functions are basically “closed cases” that can’t
   see any variables from the outside system. so when you ask for `$post->ID`, the
   function doesn’t know what `$post` is so it gives those warnings.
 * The reason that it’s working as expected, is that by default the `get_post()`
   function will use the current global `$post` value if nothing is passed to it,
   so you get back the current post.
 * To fix this is very easy. Just set `$post` as `global` so you will be working
   with the current global `$post` object too:
 *     ```
       function custom_taxonomies_terms_links(){
           global $post;
   
           // get post type by post
           $post_type = $post->post_type;
       ```
   
 * That’s all there is to it.
 *  Thread Starter [zartgesotten](https://wordpress.org/support/users/wearitwell/)
 * (@wearitwell)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/undefined-variable-post-1/#post-6322057)
 * Ah… thank you very much.
    I knew about global $post; but I tried adding it at
   the top of functions.php, thinking it would work for all functions. I didn’t 
   think of putting it INSIDE my function! THANKS again, also for explaining so 
   nicely!

Viewing 2 replies - 1 through 2 (of 2 total)

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## Tags

 * [functions](https://wordpress.org/support/topic-tag/functions/)
 * [variable](https://wordpress.org/support/topic-tag/variable/)

 * In: [Hacks](https://wordpress.org/support/forum/plugins-and-hacks/hacks/)
 * 2 replies
 * 2 participants
 * Last reply from: [zartgesotten](https://wordpress.org/support/users/wearitwell/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/undefined-variable-post-1/#post-6322057)
 * Status: resolved

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