根据安装情况，您可以使用两种截然不同的挂钩：

• wpmu_validate_user_signup 对于多站点和registration_errors 对于单个站点user_name_is_forbidden() 满足您的需求。对匹配项使用正则表达式。

  // multi-site
  add_filter( \'wpmu_validate_user_signup\', function( $result )
  {
      // there is already an error
      if ( $result[\'errors\']->get_error_message(\'user_name\') )
          return $result;
  
      if ( user_name_is_forbidden( $result[\'user_name\'] ) )
          $result[\'errors\']->add(\'user_name\',  __( \'That username is not allowed.\' ) );
  
      return $result;
  });
  
  //single-site
  add_filter( \'registration_errors\', function( $errors, $name )
  {
      if ( user_name_is_forbidden( $name ) )
          $errors->add(\'user_name\',  __( \'That username is not allowed.\' ) );
      return $errors;
  }, 10, 2);
  
  
  function user_name_is_forbidden( $name )
  {
      // If you need the character \'~\', write it as \'\\~\'.
      $forbidden = array(
          \'admin.*\',
          \'genitals.*\',
          \'system.*\'
      );
  
      return (bool) preg_match( \'~\' . join( \'|\', $forbidden ) . \'~i\', $name );
  }