Get number from string

Question

I am trying to get the enclosed number between two slashes in a URL using regex. The code regex I have is not working, I am fairly new to regex and don't really understand it.

The regex:

http:\/\/?www\.?example\.com\/g\/(^\d$)\/\w

The URL:

http://www.example.com/g/1337/Game-Title

Trying to get the "1337", which is the PlaceId. The http:// and www. are optional

Which language are you using these regexes in?

Niels Abildgaard
– Niels Abildgaard

2015-06-22 08:05:35 +00:00
Commented Jun 22, 2015 at 8:05 — Niels Abildgaard
– Niels Abildgaard, Commented Jun 22, 2015 at 8:05

Avinash Raj · Accepted Answer · 2015-06-22 08:08:35Z

5

Use \d+ to match one or more digits.

\b(?:http:\/\/)?(?:www\.)?example\.com\/g\/(\d+)\/\w

put http:// and www. inside a capturing or non-caturing group and then make it as optional by adding ? quantifier next to that group. For both http and https, it would be (?:https?:\/\/)?

DEMO

edited Jun 22, 2015 at 8:08

answered Jun 22, 2015 at 8:03

Avinash Raj

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6 Comments

Adam S. Over a year ago

That got it partially working, but I want to to work without http;// OR www. being there.

Niels Abildgaard Over a year ago

In addition, the \w should probably be \w+ or [aA-zZ0-9_\-]+

Avinash Raj Over a year ago

@NielsAbildgaard he just want to capture that particular digit only, so no prob..

Avinash Raj Over a year ago

@AdamS. ya, both are optional.

Avinash Raj Over a year ago

^(?:http:\/\/)?(?:www\.)?example\.com\/g\/(\d+)\/[-\w]+$

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