PHP REGEX:从 URL 获取域

问题描述

我想要的

我想从 URL 获取 domain 部分，所以从 http://example.com/ -> example.com

I want to get from a URL the domain part so from http://example.com/ -> example.com

示例:

+----------------------------------------------+-----------------------+
| input                                        | output                |
+----------------------------------------------+-----------------------+
| http://www.stackoverflow.com/questions/ask   | www.stackoverflow.com |
| http://validator.w3.org/check                | validator.w3.org      |
| http://www.google.com/?q=hello               | www.google.com        |
| http://google.de/?q=hello                    | google.de             |
+----------------------------------------------+-----------------------+

我在 stackoverflow 中发现了一些相关的问题，但没有一个是我想要的.

I found some related questions in stackoverflow but none of them was exactly what I was looking for.

感谢您的帮助！

推荐答案

没有必要为此使用正则表达式.PHP 有一个内置函数可以做到这一点.使用 parse_url():

There's no need to use a regex for this. PHP has an inbuilt function to do just this. Use parse_url():

$domain = parse_url($url, PHP_URL_HOST);

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