How to allow users to manage only own terms in custom taxonomy WordPress

Dbranes answers:

Hi, you can try this modification to the solution by @MikeSchinkel, provided by the link of @Navjot Singh

Here I apply it for the "category" taxonomy.

/**
* Restrict categories per users.
*
* Each user can only see his own created categories (admins can see all)
*
* Modification of http://wordpress.stackexchange.com/a/8432/26350
*
*/

add_filter( 'list_terms_exclusions', 'wpq_list_terms_exclusions', 10, 3 );

function wpq_list_terms_exclusions( $exclusions, $args, $taxonomies ) {
if ( is_admin() // only modify the get_terms() calls in the backend
&& ! current_user_can( 'manage_options' ) // not for users with "admin" capability
&& current_user_can( 'manage_categories' ) // only for users that can modify categories
&& in_array( 'category', $taxonomies ) // when the taxonomy is "category"
) {
$user = wp_get_current_user();
$terms = get_user_meta( $user->ID, 'c4u', true ); // fetch the category terms created by the current users (saved in the c4u user meta value)
$part = empty( $terms ) ? ' false ' : " t.term_id IN ( {$terms} ) "; // only fetch category terms created by the current user.
$exclusions = " {$exclusions} AND {$part} ";
}
return $exclusions;
}

add_action( 'created_term', 'wpq_created_term', 10, 3 );

function wpq_created_term( $term_id, $tt_id, $taxonomy ) {
if( 'category' === $taxonomy ) { // Intercept when a "category" term is created
$user = wp_get_current_user();
if ( $user->ID ) {
$terms = get_user_meta( $user->ID,'c4u', true ); // fetch the category terms created by the current user
$terms = ( empty( $terms ) ? $term_id : "{$terms},{$term_id}" ); // we need this to be string with the CSV format
update_user_meta( $user->ID, 'c4u',$terms); // update the list of category terms created by the current user
}
}
}


Here I use the <em>created_term</em> hook instead.

Here the users can only see the categories they've self created.

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