Regex for url without containing (http|https|ftp) and containg port number

Question

My url will be like localhost:5557. And I will not allow http:// or https:// or ftp:// in my url.

Also I tried

^(?:!(ftp|http|https):\/\/)?([a-zA-Z0-9]+\.)?[a-zA-Z0-9][a-zA-Z0-9-]+\.[a-zA-Z]{2,6}?$

But I am getting false when adding the port number.

Any suggestions please !

Avinash Raj · Accepted Answer · 2015-12-23 07:19:55Z

1

Negative lookahead must be like (?!..) not (?:!...)

^(?!(ftp|https?):\/\/)([a-zA-Z0-9]+\.)?[a-zA-Z0-9][a-zA-Z0-9-]+\.[a-zA-Z]{2,6}(?::\d{4})?$

answered Dec 23, 2015 at 7:19

Avinash Raj

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7 Comments

Shesha Over a year ago

Can I make .com portion as optional ? Because my url may be like localhost:7678 or localhost.com:67876

Avinash Raj Over a year ago

^(?!(ftp|https?):\/\/)([a-zA-Z0-9]+\.)?[a-zA-Z0-9][a-zA-Z0-9-]+(?:\.[a-zA-Z]{2,6}|:\d{4})?$

Shesha Over a year ago

Hi Avinash, this is working for me. What i need now is, I need to accept www. in my regex. For ex: www.test.com, www.test.com:76676 like this. And also I am not going to accept http|https|ftp. Can you help me to upgrade this regex which accepts www. ?

Avinash Raj Over a year ago

try ^(?!(ftp|https?):\/\/)([a-zA-Z0-9]+\.)?[a-zA-Z0-9][a-zA-Z0-9-]+(\.[a-z]{2,6})?(:\d{4})?$, regex101.com/r/lD6gY2/3

Shesha Over a year ago

But this not working for websites which may contain subdomains such as www.test.example.com www.test.example.com:75667 ^(?!(ftp|https?):\/\/)([a-zA-Z0-9]+\.)?([a-zA-Z0-9]+\.)?[a-zA-Z0-9][a-zA-Z0-9-]+(\.[a-z]{2,6})?(:\d{4})?$ Is this right for urls with sub domains ??

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