How to programmatically add a user to a role?

2 comments

1. You can do that like this :

   $my_user = new WP_User( $user_id );
   $my_user->set_role( "editor" );
   

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2. Just fleshing out the previous answer using an example with my code.

       <?php
       ini_set('display_errors', 1);
       ini_set('display_startup_errors', 1);
       error_reporting(E_ALL);
       global $wpdb;
       $prefix = $wpdb->prefix;
       echo "<pre>";
       $umeta=$prefix.'usermeta';
       $u=$prefix.'users';
   
       $sql ="select ID, display_name from $u where ID=1";
       $result = $wpdb->get_results($sql, ARRAY_A);
       print_r($result);
       foreach($result as $value){
       print_r($value);
       $user_id = $value['ID'];
       $my_user = new WP_User($user_id );
       $my_user->remove_role( "Ladder" );
       print_r($my_user);
       }
       ?>
   

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