Regex for url route with query string

Question

I am having hard time learning regex and honestly I have no time at the moment. I am looking for a regex expression that would match url route with query string

What I need is regex to match population?filter=nation of course where nation can be any string.

Based on my current regex knowledge I have also tried with regex expression /^population\/(?P<filterval>\d+)\/filter$/ to match population/nation/filter but this does not work.

Any suggestion and help is welcome.

Perhaps, ^\/?population(?:\/|\?filter=)(?P<filterval>[^\/]+)(?:\/filter\/?)?$ (see demo)? — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Jul 7, 2015 at 9:48
Wait ... which expression do you want to match? the first or the second one? — Marco
– Marco, Commented Jul 7, 2015 at 9:48
@Serv Ideally first second one was attempt based on my regex knowledge. — eomeroff
– eomeroff, Commented Jul 7, 2015 at 9:57
Can nation values contain characters like -? Like in "Great-Britain" or "New-Zealand" just for the sake of being there. Not being gramatically correct and is this the complete querystring or does something else follow? (filter=nation&foo=bar) ? — Marco
– Marco, Commented Jul 7, 2015 at 10:02

Marco · Accepted Answer · 2015-07-07 11:21:13Z

1

This does match only your first query string format:

population\?filter=[\w]+[-_]?[\w]+

Addiotionally it allows for - and _ as bindings between words. If you know, that your string ends right there, you can also add an $ to the end to mark it so.

If you know that the nation is only alphabetical characters, yu can use the simplified version:

 population\?filter=[\w]+

Demo

edited Jul 7, 2015 at 11:21

answered Jul 7, 2015 at 10:09

Marco

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eomeroff Over a year ago

I had to add forward slashes at the beginning and end '/population\?filter=[\w]+[-_]?[\w]+/' because it reported "Warning: preg_match(): Delimiter must not be alphanumeric or backslash in ..." Beside that this was very helpful! Thanks!

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