WordPress 默认不会在帖子/页面内容中执行 PHP，除非它有短代码.

WordPress does not execute PHP in post/page content by default unless it has a shortcode.

执行此操作的最快和最简单的方法是使用一个插件，该插件允许您运行嵌入在帖子内容中的 PHP.

The quickest and easiest way to do this is to use a plugin that allows you to run PHP embedded in post content.

还有另外两种快速而简单"的方法可以在没有插件的情况下完成它:

There are two other "quick and easy" ways to accomplish it without a plugin:

• 将其设为短代码(将其放入 functions.php 并使其与国家/地区名称相呼应)，这非常简单 - 请参阅此处:WP Codex 的 Shortcode API

• Make it a shortcode (put it in functions.php and have it echo the country name) which is very easy - see here: Shortcode API at WP Codex

将其放入模板文件 - 根据您的默认页面模板为该页面创建自定义模板，并将 PHP 添加到模板文件中而不是帖子内容中:自定义页面模板

Put it in a template file - make a custom template for that page based on your default page template and add the PHP into the template file rather than the post content: Custom Page Templates