Change post categories while saving post

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I’m trying to change post categories inside a save_post action callback function, but I get endless recursion, because wp_update_post method fires save_post action itself.

Maybe somebody did this before& Or there is a way to change post categories without using wp_update_post method?

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2 comments

  1. you can pass the new categories to the function, in the same way you add the post.

    $newcats = array(
get_cat_id($catname_one),
get_cat_id($catname_two),
get_cat_id($catname_three),
get_cat_id($catname_four)
); 

$wpx_post_arr = array(
'ID'=>$post->ID,
'post_category'=>$newcats
);  

wp_update_post($wpx_post_arr);