如何过滤 Smarty 变量以仅输出数字?

问题描述

相当简单的问题，但我是正则表达式和 smarty 模板的新手，我似乎无法弄清楚如何在我的 smarty 模板中使用它.

Fairly simple question, but I am new to regular expressions and smarty templates, and I can't seem to figure out how to get this working in my smarty template.

基本上，我有可以包含字符串值的智能字符串，例如:

Basically, I have smarty string that can contain string values like:

Home Page Layout 1-1
Home Page Layout 1-2
Home Page Layout 2-1
etc..

我只想从字符串中提取整数，以便输出如下:

I want to extract just the integers from the string so that the output is as followed:

11
12
21

如您所见，我正在删除除整数之外的所有内容.我在四处搜索后尝试执行以下操作，但它不起作用或输出任何内容.

As you can see, I'm removing everything but the integers. I tried doing the following after searching around, but it doesn't work or output anything.

{$SelectHomePageLayout|regex_replace:'[^0-9]+':''}

相当简单，但我不确定我做错了什么.

Fairly simple but I'm just not sure what I'm doing wrong.

推荐答案

您的正则表达式缺少正则表达式分隔符(即 //).使用以下一个，并检查分隔符是如何添加的.

You are missing the regex delimiter(i.e. //) for your regex. Use the following one, and check how the delimiter is added.

{$SelectHomePageLayout|regex_replace:'/[^0-9]+/':''}
                                      ^       ^

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