Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=\d[\d ,+-]*\d$)

\da digit

Character Class[\d ,+-]*

*matches any number of characters from the set below:

\da digit

the literal (32₁₀ / 40₈ / 20₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\da digit

$end of line

Negative Lookahead(?!.*[ ,+-]{2})

.*any character (except for line terminators), repeated any number of times

Character Class[ ,+-]{2}

{2}matches exactly 2 characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Positive Lookahead(?=(?:\D*\d){10}\D*$)

Non-Capturing Group(?:\D*\d){10}

{10}repeats the group contents below exactly 10 times:

\D*any character that's not a digit, repeated any number of times

\da digit

\D*any character that's not a digit, repeated any number of times

$end of line

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

26 tokens

^(?=\d[\d ,+-]*\d$)(?!.*[ ,+-]{2})(?=(?:\D*\d){10}\D*$).*

New

12,34 567-890
344 567-890
12,344 567-890
,1234 567-890
12,+3456780

12,34 567-890
344 567-890
12,344 567-890
,1234 567-890
12,+3456780