Regular expression for checking website url

Question

I need to check the web address, using regular expression.

If user type URL as

www.test.com
http://www.test.com
https://www.test.com

I have a regular expression like

/^(http\:\/\/[a-zA-Z0-9_\-]+(?:\.[a-zA-Z0-9_\-]+)*\.[a-zA-Z]{2,4}(?:\/[a-zA-Z0-9_]+)*(?:\/[a-zA-Z0-9_]+\.[a-zA-Z]{2,4}(?:\?[a-zA-Z0-9_]+\=[a-zA-Z0-9_]+)?)?(?:\&[a-zA-Z0-9_]+\=[a-zA-Z0-9_]+)*)$/

but it will only allow the second option only. How can I modify the regular expression so, that it accepts 1st and 3rd option too?

See https://mathiasbynens.be/demo/url-regex – Martin Thoma Aug 17 '17 at 09:35 — Martin Thoma, Aug 17 '17 at 09:35

Salman A · Accepted Answer · 2010-03-22T06:24:59.977

24

This is a pretty basic expression for testing domain names:

@^(http\:\/\/|https\:\/\/)?([a-z0-9][a-z0-9\-]*\.)+[a-z0-9][a-z0-9\-]*$@i

Should match:

domain.com
www.domain.com
http://domain.com
https://domain.com

edited Mar 22 '10 at 06:24

answered Mar 22 '10 at 06:19

Salman A

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4

Note that this answer will not match upper case letters. – Turtle Mar 22 '10 at 06:39
3

I added the small "i" at the end of the pattern a few minutes ago. That should fix it. – Salman A Mar 22 '10 at 07:12
2

For .Net, it is (?i:(http\:\/\/|https\:\/\/)?([a-z0-9][a-z0-9\-]*\.)+[a-z0-9][a-z0-9\-]*$) – Hong Jan 17 '14 at 12:29
This is matching http: //www.akgkguuiop which is a broken URL – Johnykutty Nov 25 '15 at 11:14
1

@Johnykutty it does not check if the [tld](https://en.wikipedia.org/wiki/Top-level_domain) is valid. `www.akgkguuiop` is a valid hostname, just that has a nonsense tld. – Salman A Nov 25 '15 at 11:30

score 3 · Answer 2 · edited Mar 22 '10 at 07:34

Use the following program for validating the website URL.

It will be validating the following and any valid website URL.


    <?php
            $string_url="https://www.test.com";
            $reg_exp = "/^(http(s?):\/\/)?(www\.)+[a-zA-Z0-9\.\-\_]+(\.[a-zA-Z]{2,3})+(\/[a-zA-Z0-9\_\-\s\.\/\?\%\#\&\=]*)?$/";
            if(preg_match($reg_exp, $string_url) == TRUE){
            echo "URL is valid format";
            }
            else{
            echo "URL is invalid format";
            }
    ?>

score 2 · Answer 3 · answered Mar 09 '16 at 11:51

2

You can use this pattern also:

(http(s)?://)?([\w-]+\.)+[\w-]+(/[\w- ;,./?%&=]*)?

This will work for matching:

http://www.google.com
https://www.google.com
www.google.com
google.com
google.in

Simple pattern for matching.

Hope this will help someone!!!

answered Mar 09 '16 at 11:51

Mohd Haider

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Close, but fails with this test data "2020-10-27 18:00:10.128" – Brendan Kim Mar 18 '22 at 22:33
@BrendanKim, I am not sure about this test data. This simple regex will work for website url checking and looks like you are checking date string. So it will not work for this. Let me know if I am missing something here. – Mohd Haider Mar 24 '22 at 10:39

score 1 · Answer 4 · answered Mar 22 '10 at 06:17

You can make the http:// optional and also the s in https optional as:

/^((?:http(?:s)?\:\/\/)?[a-zA-Z0-9_-]+(?:.[a-zA-Z0-9_-]+)*.[a-zA-Z]{2,4}(?:\/[a-zA-Z0-9_]+)*(?:\/[a-zA-Z0-9_]+.[a-zA-Z]{2,4}(?:\?[a-zA-Z0-9_]+\=[a-zA-Z0-9_]+)?)?(?:\&[a-zA-Z0-9_]+\=[a-zA-Z0-9_]+)*)$/

score 1 · Answer 5 · answered May 26 '16 at 08:50

1

Pattern

(https?:\/\/)?([\w\d]+\.)?[\w\d]+\.\w+\/?.+

This will work for matching:

www.demo.com

http://foo.co.uk/

answered May 26 '16 at 08:50

Swadesh Ranjan Dash

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score 0 · Answer 6 · edited Oct 01 '12 at 02:19

0

Try the following instead :

filter_var($your_variable, FILTER_VALIDATE_URL);

edited Oct 01 '12 at 02:19

Stephan

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answered Sep 30 '12 at 20:56

1ce

1

the parse_url() function is also useful in this context. – Jeff Stander Jul 27 '16 at 21:59

score 0 · Answer 7 · edited Apr 03 '23 at 15:07

0

Well my Regular Expression will with all type of URL.

^(http(s?):\/\/)?(www\.)?+([a-zA-Z0-9\.\-\_]+)(\.[a-zA-Z]{2,3})+(\/[a-zA-Z0-9\_\-\s\.\/\?\%\#\&\=]*)?

Tap to see the Proof with test cases passed

edited Apr 03 '23 at 15:07

Syakur Rahman

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answered Apr 02 '23 at 19:57

Adarsh Gupta

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Please check your regex! It must be valid for php. Use e.g. https://regex101.com/ . – Andy A. Apr 03 '23 at 06:50

Regular expression for checking website url

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