Strict tag list – user should choose only existing tags for posts

2 comments

1. YOu can deactive the default tag feature and add via plugin an custom taxonomie, that only list your created tags, like category meta box. Its also possible to design this how the tag meta box.

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2. Solution

   Adding a hook to the create_term action works. Two things to do:

   • Check the referer, and if it comes from ‘post.php’, die
   • but before stopping, delete the new (and unwanted) tag with wp_delete_term($term_id, “post_tag”);

   Source code as plugin

   <?php
   /*
   Plugin Name: Tag Checker
   */
   
   add_action('create_term', 'tag_checker_hook');
   
   function tag_checker_hook($term_id) 
   {
       $referer = $_SERVER['HTTP_REFERER'];
   
       if (strpos($referer, "/wp-admin/post.php") !== false)
       {
           // Delete it
           wp_delete_term($term_id, "post_tag");
   
           wp_die("You are not able to create new tags.");
       }
   }
   
   ?>
   

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