Why is my RegEx working in PHP but not in JavaScript?

Question

I can't get those RegEx pattern to work with JavaScript (in PHP they work):

/^[^\/home\/]/
/^\/home\/$/
/^\/home\/.+\/.+$/

I want to allow input like this:

/home/username

What I don't want is:

/home/
/username
/home/username/info

Here is my code:

var regex1 = /^[^\/home\/]/;
var regex2 = /^\/home\/$/;
var regex3 = /^\/home\/.+\/.+$/;
if( regex1.test(homedir)
|| regex2.test(homedir)
|| regex3.test(homedir) ) { ... }

I have no errors in the console.

Could someone explain to me why it is not working in JavaScript?

EDIT

I changed it to /^\/home\/[A-Za-z0-9]+$/ and now it's working:

var rgx = /^\/home\/[A-Za-z0-9]+$/;
if( !rgx.test(homedir) ) { ... }

"why it is not working in JavaScript" could you tell what is not working? there's some errors in the console? are you trying to replace or to find something with this regex? Please, be more specific — Calvin Nunes
– Calvin Nunes, Commented Apr 30, 2018 at 17:58
Possible duplicate of what is the difference between PHP regex and javascript regex — Gino Pane
– Gino Pane, Commented Apr 30, 2018 at 18:00
Thank you very much @sln - yes, I agree to the fact that I maybe have to rewrite it. I Just wanted to understand the difference as in PHP it's working. — manifestor
– manifestor, Commented Apr 30, 2018 at 18:19
I rewrote it to /^\/home\/[A-Za-z0-9]+$/ and it's working fine as I now check if the string matches instead of checking if it doesn't match, just as @sln suggested. Thank you all for you help :) — manifestor
– manifestor, Commented Apr 30, 2018 at 18:38

NSTuttle · Accepted Answer · 2018-04-30 18:04:11Z

0

Remove the string start Regex parameter ^

You will now have: \/home\/.+\/.+$

Example built here showing validation: Regex Home URL example

answered Apr 30, 2018 at 18:04

NSTuttle

3,3352 gold badges19 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

manifestor Over a year ago

Thank you, I did that (removed the ^). I now matches also valid input like /home/username.

NSTuttle Over a year ago

Regexr is a great tool to help you build and validate regular expressions

Collectives™ on Stack Overflow

Why is my RegEx working in PHP but not in JavaScript?

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related