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- add_action('personal_options_update', 'check_display_name');
- add_action('edit_user_profile_update', 'check_display_name');
- function check_display_name($user_id) {
- global $wpdb;
- $err['display'] = $wpdb->get_var($wpdb->prepare("SELECT COUNT(ID) FROM $wpdb->users WHERE display_name = %s AND ID <> %d", $_POST['display_name'], $_POST['user_id']));
- $err['nick'] = $wpdb->get_var($wpdb->prepare("SELECT COUNT(ID) FROM $wpdb->users as users, $wpdb->usermeta as meta WHERE users.ID = meta.user_id AND meta.meta_key = 'nickname' AND meta.meta_value = %s AND users.ID <> %d", $_POST['nickname'], $_POST['user_id']));
- foreach($err as $key => $e) {
- if($e >= 1) {
- $err[$key] = $_POST['username'];
- add_filter('user_profile_update_errors', "check_{$key}_field", 10, 3);
- }
- }
- }
- function check_display_field($errors, $update, $user) {
- $errors->add('display_name_error',__('Sorry, Display Name is already in use. It needs to be unique.'));
- return false;
- }
- function check_nick_field($errors, $update, $user) {
- $errors->add('display_nick_error',__('Sorry, Nickname is already in use. It needs to be unique.'));
- return false;
- }
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