Regular Expressions 101

Group 1(\d{1,3})

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

Group 2([-\s]?\d{3}[-\s]?\d{3})

Character Class[-\s]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\sa Unicode whitespace character

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

Character Class[-\s]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\sa Unicode whitespace character

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

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

Regular Expression

(\d{1,3})([-\s]?\d{3}[-\s]?\d{3})

New

12377-456-789