Regular Expressions 101

Pro

^start of line

Positive Lookahead(?=(?:\D*\d){6})

Non-Capturing Group(?:\D*\d){6}

{6}repeats the group contents below exactly 6 times:

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

\da digit

Non-Capturing Group(?:\d{1,4}[ -]?){3}

{3}repeats the group contents below exactly 3 times:

\d{1,4}a digit, repeated between 1 and 4 times

Character Class[ -]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,4}a digit, repeated between 1 and 4 times

$end of line

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){6})(?:\d{1,4}[ -]?){3}\d{1,4}$

New

1-12-12-2222
1-123 2 2
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