试试这样的。另请阅读wp_redirect() 也

function redirect_by_role(){
  if (is_user_logged_in()) {
    $user = wp_get_current_user();
    if (is_home()) {
      if ( in_array( \'author\', (array) $user->roles ) ) {
         $redirect_url= \'\';
         wp_redirect($redirect_url, 301); exit;
      }
      elseif( in_array( \'**another_role_here**\', (array) $user->roles ) ) {
         $redirect_url= \'\';
         wp_redirect($redirect_url, 301); exit;
      }
    }

  } else { 
   // Do what you want

  }
}
// Add the action with maximum priority
add_action(\'init\',\'redirect_by_role\',0);

Vucko，尝试改变init 挂钩到wp 这样做：

function redirect_by_role(){
  if (is_user_logged_in()) {
    $user = wp_get_current_user();
    if (is_home()) {
      if ( in_array( \'author\', (array) $user->roles ) ) {
         $redirect_url= \'\';
         wp_redirect($redirect_url, 301); exit;
      }
      elseif( in_array( \'**another_role_here**\', (array) $user->roles ) ) {
         $redirect_url= \'\';
         wp_redirect($redirect_url, 301); exit;
      }
    }

  } else { 
   // Do what you want

  }
}
// Add the action with maximum priority
add_action(\'wp\',\'redirect_by_role\');