Regular Expressions 101

Pro

^start of line

Group 1((\+\d{1,3})?$\d{2,3}$)?

?repeats the group contents below at most once:

Group 2(\+\d{1,3})?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

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

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d{2,3}a digit, repeated between 2 and 3 times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\d{4,5}a digit, repeated between 4 and 5 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

$end of line

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

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25 tokens

^((\+\d{1,3})?\(\d{2,3}\))?\d{4,5}-\d{4}$

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