我无法通过全新安装的 WordPress 3.3.1 复制您所看到的内容.我有一个只有两个文件的主题，style.css，包含:

I can't duplicate what you're seeing with a clean install of WordPress 3.3.1. I have a theme with just two files, style.css, containing:

/*
Theme Name:     ***-8946077
Template:       twentyeleven
Version:        0.0.1
*/
@import url("../twentyeleven/style.css");

和coming-soon.php，包含:

<?php
 /*
  Template Name: Coming Soon
 */

get_header();
?><h1>Coming Soon</h1><?php
get_footer();
?>

其中的第一部分是从您的问题中复制的.

the first part of which was copied from your question.

我看到了预期的模板:

我唯一能想到的就是仔细检查:

The only things I can think of are to double-check:

• 该文件存在于您正在运行的服务器上
• 该文件位于子模板的目录中(尽管如果它位于 twentyeleven 目录中，它应该可以工作)
• twentyeleven 目录中没有同名的文件，(我认为)优先
• 文件名以.php
结尾
• 模板"和名称:"之间只有一个空格(使用的正则表达式包含文字模板名称:)

• the file exists on the server you're running on
• the file's in the child template's directory (though it should work if it's in the twentyeleven directory)
• there's no file with the same name in the twentyeleven directory, which (I think) would take precedence
• the file name ends in .php
• you only have a single space between "Template" and "Name:" (the regex used contains the literal Template Name:)

否则，下拉列表由 wp-admin/includes/theme.php 中的 get_page_templates 函数填充.可能值得在其中粘贴一些调试代码，以查看 $templates 变量是否包含 coming-soon.php.

Failing that, the dropdown is populated by the get_page_templates function in wp-admin/includes/theme.php. Might be worth sticking some debug code in there to see if the $templates variable includes coming-soon.php.