Regular Expressions 101

^start of line

Group 1((\+?)(1?(\-?)?))

Group 2(\+?)

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

Group 3(1?(\-?)?)

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

Group 4(\-?)?

?repeats the group contents below at most once:

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

Group 5(\d{3})

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

Group 6(-|\s)?

?repeats the group contents below at most once:

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative\s

\sany whitespace character

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

Group 7(-|\s)?

?repeats the group contents below at most once:

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative\s

\sany whitespace character

\d{4}a digit, repeated exactly 4 times

$end of line

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^((\+?)(1?(\-?)?))(\d{3})(-|\s)?\d{3}(-|\s)?\d{4}$

New

444-666-1232
1-234-123-1234
1234-123-1234
+1234-123-1234

444-666-1232
1-234-123-1234
1234-123-1234
+1234-123-1234