Regular expression not working without www

Question

Below regular expression not working without www

 /((?:https?\:\/\/|www\.)(?:[-a-z0-9]+\.)*[-a-z0-9]+.*)/i

I have checked below URLs

http://regexr.com       (working, match)
http://www.regexr.com/  (working, match)
www.regexr.com          (working, match)
regexr.com              (not working, should be match)
abc@gmail.com           (working, not match)

If i used below code

((?:https?\:\/\/|)(?:[-a-z0-9]+\.)*[-a-z0-9]+.*)

then it matched email id also

abc@gmail.com           (not working, should not match)

What exactly do you want to achieve? What are you trying to validate? — F.P, Jun 10 '16 at 05:35
Possible duplicate, http://stackoverflow.com/questions/736513/how-do-i-parse-a-url-into-hostname-and-path-in-javascript — rrauenza, Jun 10 '16 at 05:40
@rrauenza i have tried this regex ^(https?\:)\/\/(([^:\/?#]*)(?:\:([0-9]+))?)(\/[^?#]*)(\?[^#]*|)(#.*|)$ but it matched email also(abc@gmail.com) and not worked for url http://regexr.com — thecodedeveloper.com, Jun 10 '16 at 05:42
and what about this => http://code.tutsplus.com/tutorials/8-regular-expressions-you-should-know--net-6149 — xAqweRx, Jun 10 '16 at 05:43
@xAqweRx i think it worked for me ^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$ — thecodedeveloper.com, Jun 10 '16 at 05:48
@amallard yes it not should matched abc@gmail.com because it's email. — thecodedeveloper.com, Jun 10 '16 at 05:53
The regexp says that a match has to begin with either `https?://` or `www.`. They're not optional, so why should it work without `www`? — Barmar, Jun 10 '16 at 06:46

score 1 · Answer 1 · answered Jun 10 '16 at 06:48

1

Demo on regexr.com

(https?:\/\/)?\w+(\.\w+)+(\/\w+)*(\/\w+\.\w+)?(\?[\w%&=.]*)*(?=[^\w.?&%=])

try this,

answered Jun 10 '16 at 06:48

Parth Patel

521
2
12

thecodedeveloper.com · Accepted Answer · 2016-06-10T06:51:40.070

0

Below regular expression worked fine, more information click here

^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$

Worked because it match below Url's and not email id

http://regexr.com/

http://www.regexr.com/

https://regexr.com

https://www.regexr.com

www.regexr.com

regexr.com

abc@gmail.com (worked, it not match email id)

Demo

edited Jun 10 '16 at 06:51

answered Jun 10 '16 at 06:00

thecodedeveloper.com

3,220
5
36
67

Regular expression not working without www

2 Answers2