Validate URL without http, https and www

Question

I have an input box where user can enter their domain. I want to make sure the domain should be like that:

example.com
hello.com
okay.com

NOT

www.example.com
https://www.hello.com
https://okay.com

I mean no http, https and www at the beginning of the domain.

So far I got this:

} elseif( !preg_match('/^[a-zA-Z. ]+$/', $domain) ) {
    $output['message'][] = 'Your domain should be start with http, https or www but can contain (.)com';
}

How can I improve this preg_match function to get the desire validation?

and www at the beginning of the domain -- please clarify why subdomains are not permitted? — AD7six
– AD7six, Commented Jun 9, 2022 at 8:02
"Your domain should be contain only characters." - that is quite a misleading error message, when your pattern actually allows not only for dots, but for spaces for some reason as well. And do you really want to reject any user input here, if their domain name would contain digits or hyphens ...? — C3roe
– C3roe, Commented Jun 9, 2022 at 8:03
Does this answer your question? PHP validation/regex for URL - if you just want the domain without a protocol, why not strip it from user input before using it — AD7six
– AD7six, Commented Jun 9, 2022 at 8:08
"I think you don't understand what I Need" - and I am not too sure you understand what you need :-) "I just don't want the http, https or www from the begging of the string" - that alone would not be a reason to reject domain names that contain digits or hyphens then. — C3roe
– C3roe, Commented Jun 9, 2022 at 8:31

shingo · Accepted Answer · 2022-06-09 08:33:53Z

2

Try this /^(?!(www|http|https)\.)\w+(\.\w+)+$/

It matches

example.com
hello.com
okay.com
example.123
1.example.com.cn
s3.amazonaws.com

It doesn't match

www.example.com
https://www.hello.com
https://okay.com
http.example.com

edited Jun 9, 2022 at 8:33

answered Jun 9, 2022 at 8:24

shingo

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8 Comments

Shibbir Over a year ago

Thanks for your reply but what about httpyahoo.com or httpsyahoo.com or wwwyahoo.com ?

shingo Over a year ago

They match, if you don't want to match these domains, just remove the first dot.

Shibbir Over a year ago

I did it but not working. I enter this text httpyahoo.com but showing me my validation error. Its should be passed.

Shibbir Over a year ago

I am using this ! preg_match('/^(?!(www|http|https))\w+(.\w+)+$/', $domain)

shingo Over a year ago

Sorry, I missed backslashes before dot.

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