Fatal error: Uncaught Error: Call to undefined function Code_Snippets\Settings\add_action() in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\code-snippets\php\settings\settings.php:189 Stack trace: #0 {main} thrown in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\code-snippets\php\settings\settings.php on line 189