Regular Expressions 101

Explanation
Pro

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

Group 1(0\d{1,2}?)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\d{1,2}?a digit, repeated between 1 and 2 times

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

Group 2(\s*?|-??)

1st Alternative\s*?

\s*?any whitespace character, repeated any number of times

2nd Alternative-??

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

Group 3(\d{3,4}(\s*?|-??)\d{3,4})

\d{3,4}a digit, repeated between 3 and 4 times

Group 4(\s*?|-??)

1st Alternative\s*?

\s*?any whitespace character, repeated any number of times

2nd Alternative-??

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

\d{3,4}a digit, repeated between 3 and 4 times

Detailed match information will be displayed here automatically.

26 tokens

\(??(0\d{1,2}?)\)??(\s*?|-??)(\d{3,4}(\s*?|-??)\d{3,4})

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