Regular Expressions 101

Explanation

Pro

^start of line

Negative Lookahead(?!(?:[^\d\n]*\d){12})

Non-Capturing Group(?:[^\d\n]*\d){12}

{12}repeats the group contents below exactly 12 times:

Negated Character Class[^\d\n]*

*matches any number of characters outside the set below:

\da Unicode decimal digit

\na line-feed (newline) character (ASCII 10)

\da Unicode decimal digit

Group 1(\+?\d{1,2})

\+?optionally matches the literal + (43₁₀ / 53₈ / 2B₁₆)

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

Group 2([(-]*[0-9]{3}[)-]*)

Character Class[(-]*

*matches any number of characters from the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[)-]*

*matches any number of characters from the set below:

)the literal ) (41₁₀ / 51₈ / 29₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3([0-9](?:-?[0-9]){6,8})

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:-?[0-9]){6,8}

{6,8}repeats the group contents below between 6 and 8 times:

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$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.

25 tokens

^(?!(?:[^\d\n]*\d){12})(\+?\d{1,2})([(-]*[0-9]{3}[)-]*)([0-9](?:-?[0-9]){6,8})$

New

+7(994)849-45-16
+7(994)849-4516
+7(994)84945-16
+7994849-45-16

+7(994)849-45-16
+7(994)849-4516
+7(994)84945-16
+7994849-45-16