这个正则表达式匹配什么？ 来自mediawiki源代码的php正则表达式

Question

This is a regex from a mediawiki, an open source wiki solution.

/\[((http\:\/\/|https\:\/\/|ftp\:\/\/|irc\:\/\/|ircs\:\/\/|gopher\:\/\/|telnet\:\/\/|nntp\:\/\/|worldwind\:\/\/|mailto\:|news\:|svn\:\/\/|git\:\/\/|mms\:\/\/|\/\/)[^][<>"\x00-\x20\x7F\p{Zs}]+)\p{Zs}*([^\]\x00-\x08\x0a-\x1F]*?)\]/Su

To me it seems like it matches uri's, but i can't get it to match anything. And im having trouble understanding the last part of the regex, namely.

[^][<>"\x00-\x20\x7F\p{Zs}]+)\p{Zs}*([^\]\x00-\x08\x0a-\x1F]*?)\]

what the heck does this do?

Any help on decoding this is greatly appreciated.

Answer 1

This regex matches external links like

[http://www.stackoverflow.com]
[https://www.stackoverflow.com StackOverflow]
[ftp://ftp.mozilla.org Mozilla]