Regular Expressions 101

Explanation

Pro

Non-Capturing Group(?:\d{3}-| # area code without parentheses but with dash \(\d{3}\)\ )

1st Alternative\d{3}-

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative # area code without parentheses but with dash \(\d{3}\)\

Comment: area code without parentheses but with dash

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

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

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\ the literal (32₁₀ / 40₈ / 20₁₆)

Comment: -or- area code with parentheses and no dash

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

Comment: first 3 digits

- the literal text -

Comment: second dash

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

Comment: last 4 digits

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?:\d{3}-|  # area code without parentheses but with dash
\(\d{3}\)\ ) # -or- area code with parentheses and no dash
\d{3} # first 3 digits
-      # second dash
\d{4} # last 4 digits

New

(415) 123-2342 and 415-905-1234 are the numbers.