Fatal error: Uncaught Error: Call to undefined function __() in D:\www\wordpress - 安裝環境+外掛測試\02.外掛程式\常用外掛\code-snippets\php\strings.php:8 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\strings.php on line 8