Regular Expressions 101

Group 1(^\d{1,3}((\s|-))?$?\d\d\d$?|^$?\d\d\d$?)

1st Alternative^\d{1,3}((\s|-))?$?\d\d\d$?

^start of line

\d{1,3}a digit, repeated between 1 and 3 times

Group 2((\s|-))?

?repeats the group contents below at most once:

Group 3(\s|-)

1st Alternative\s

\sany whitespace character

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

\da digit

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

2nd Alternative^$?\d\d\d$?

^start of line

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

\da digit

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

Group 4((\s|-))?

?repeats the group contents below at most once:

Group 5(\s|-)

1st Alternative\s

\sany whitespace character

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\da digit

Group 6((\s|-))?

?repeats the group contents below at most once:

Group 7(\s|-)

1st Alternative\s

\sany whitespace character

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\da digit

$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.

Search reference

Regular Expression

(^\d{1,3}((\s|-))?\(?\d\d\d\)?|^\(?\d\d\d\)?)((\s|-))?\d\d\d((\s|-))?\d\d\d\d$

New

// These Should Work
 
1 123 321 1234
1 (123-321-1234
11233211234
1(123)321-1234
123-321-1234

1-123321-1234
1(123321-1234

// These Should Not

1111 123-321-1234 
1 123 32112-34
1(123) -321-1234
1(123321123-4
12345678901234

Regular Expression

Substitution