CODEWITHSUNDEEP
regex
qwerty
qwerty

Reputation: 393

PHP Regex: Replace anything that isn't a dot or a digit?

I'm trying to see if a string is an IP address. Since IPv6 is rolling out it's better to support that too, so to make it simple, i just want to replace anything that isn't a dot or a number.

I found this regex on stackoverflow by searching:

\d+(?:\.\d+)+

but it does the opposite of what i want. Is it possible to inverse that regex pattern?

Thanks!

Upvotes: 5

Views: 5848

Answers (4)

Alan
Alan

Reputation: 259

Regex shortcuts are case sensitive. I think you were trying to do something like this, but what you want is capital D [\D] = any non-digit.

in php it looks like this:

preg_replace('/[\D]/g', '', $string);

javascript its like this:

string.replace(/[\D]/g, '');

Upvotes: -1

user557597
user557597

Reputation:

I might try something like this (untested):
Edit:
Old regex was way off, this appears to do better (after testing):
find: .*?((?:\d+(?:\.\d+)+|))
replace: $1

do globally, single line.

In Perl: s/.*?((?:\d+(?:\.\d+)+|))/$1/sg

Upvotes: 0

Rusty Fausak
Rusty Fausak

Reputation: 7525

Try the following:

[^.0-9]+

Matches anything that is not a dot or a number

Upvotes: 5

Edoardo Pirovano
Edoardo Pirovano

Reputation: 8334

This regex will match anything that isn't a dot or a digit:

/[^\.0-9]/

Upvotes: 6

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