How to match last 9 digit of number with space flutter

Question

I tried to match only the 9 digits of phone number

I have multi input

[phone]

or

0123456789

or

[phone]

or

01 23 45 67 89

I want one output 123456789

currently I have found how to match [phone] or 0123456789

with (\d{9}$)

But I don't find how to match with space between

thank you

Solution 1

You could use repeat matching a digit followed by 0+ times a space 8 times. For the last digit you could also match 0+ times a space and a digit and capture that in a group.

After the captured group match 0* times a space and assert the end of the string.

((?:\d *){8} *\d) *$

Explanation

• ( Capturing group
  • (?:\d *){8} Repeat 8 times a non capturing group that matches a digit and 0+ times a space
  • *\d match 0+ times a space followed by a digit
• ) Close non capturing group
• *$ Match 0+ times a space and assert the end of the string

The 9 digits including whitespace between them are in the first capturing group.

Regex demo

Solution 2

You could use

(?:\+\d{2}\ ?)?(\d[\d ]*\d)

and use the first group, see a demo on regex101.com.

Comments

[Nitneuq]

Sorry i speak too quickly,I search to remove white space in all output like 123456789 even if my input have whitespace

[The fourth bird]

One way could be to replace all whitespaces of group 1 with an empty string.