Regular Expressions 101

Pro

^start of line

Negative Lookahead(?![0()-]+$)

Character Class[0()-]+

+matches at least one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$end of line

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 1(\d{3})

\d{3}a digit, repeated exactly 3 times

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[-. ]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2(\d{3})

\d{3}a digit, repeated exactly 3 times

Character Class[-. ]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 3(\d{4})

\d{4}a digit, repeated exactly 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.

25 tokens

^(?![0()-]+$)\(?(\d{3})\)?[-. ]?(\d{3})[-. ]?(\d{4})$

New

(222)-333-4444
(010)-123-3435
(100)-454-6565
(000)-000-0000

(222)-333-4444
(010)-123-3435
(100)-454-6565
(000)-000-0000