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If I know the current post id that i have in the variable $pid

I use $terms = get_the_terms($pid, 'custom_category');

How do I get just the term id/term_taxonomy_id

if I var_dump $terms I see what I want...but I have no idea how the heck to return just the id, not an array, just the id.

Bare in mind...I less than 1/2 know what I'm doing...just face rolling keyboard to get what I want...but learning more everyday.

Cheers,

Brian

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2 Answers

up vote 1 down vote accepted

(Probably better to use get_the_terms).

$terms =  wp_get_object_terms( $pid, 'custom_category', array('fields'=>'ids'))

Get an array of term ids (will always been array, even if it is an array of one):

$ids = wp_list_pluck( $terms, 'term_id' );

If you just want one id... then 'pop' out the last id:

 $id = array_pop($ids)
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appreciate the answer...but that still just returns an array that I don't know how to get the id out of...I'm very much a rookie...no idea what to do with the return. –  Brian Thornton Apr 25 '12 at 7:13
    
@BrianThornton have edited my answer.... –  Rajeev Vyas Apr 25 '12 at 7:15
    
getting there...but it's late and I can barely see...will pick up again tomorrow...thanks for the help. –  Brian Thornton Apr 25 '12 at 8:23
    
@BrianThornton - you will always have an array because posts can have more than one term associated with them. You'll have to take out the ID youself. I would use get_the_terms rather than wp_get_object_terms. –  Stephen Harris Apr 25 '12 at 8:53
    
So this answered my question....the basics are going to be the death of me. I'm still not able to get what I want/need to work...but it's involved. So I'm writing up a rather lengthy question that I will post in a little while. Thanks guys...I learn more every day here! –  Brian Thornton Apr 25 '12 at 19:24
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try this code for getting category id from post id.

$categories = get_the_category( $post_id );
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Except for the fact that from codex.wordpress.org/Function_Reference/get_the_category "This function only returns results from the default "category" taxonomy. For custom taxonomies use get_the_terms." Believe me...I wish I could use it.... –  Brian Thornton Apr 25 '12 at 8:23
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