Regular Expressions 101

Pro

^start of string

Group 1(\+?)

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

Group 2(\d{2,4})

\d{2,4}a Unicode decimal digit, repeated between 2 and 4 times

Group 3(\s?)

\s?optionally matches a Unicode whitespace character

Group 4(\-?)

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

Group 5((\(0\))?)

Group 6(\(0\))?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group 7(\s?)

\s?optionally matches a Unicode whitespace character

Group 8(\d{2})

\d{2}a Unicode decimal digit, repeated exactly 2 times

Group 9(\s?)

\s?optionally matches a Unicode whitespace character

Group 10(\-?)

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

Group 11(\d{3})

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

Group 12(\s?)

\s?optionally matches a Unicode whitespace character

Group 13(\-?)

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

Group 14(\d{2})

\d{2}a Unicode decimal digit, repeated exactly 2 times

Group 15(\s?)

\s?optionally matches a Unicode whitespace character

Group 16(\-?)

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

Group 17(\d{2})

\d{2}a Unicode decimal digit, repeated exactly 2 times

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25 tokens

^(\+?)(\d{2,4})(\s?)(\-?)((\(0\))?)(\s?)(\d{2})(\s?)(\-?)(\d{3})(\s?)(\-?)(\d{2})(\s?)(\-?)(\d{2})

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