Regular Expressions 101

^start of line

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

Group 1([1-9]{2})

Character Class[1-9]{2}

{2}matches exactly 2 characters from the set below:

1-9one character from 1 (49₁₀) to 9 (57₁₀)

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

\s?optionally matches any whitespace character

9?optionally matches the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$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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Search reference

Regular Expression

^\(?([1-9]{2})\)?\s?9?[0-9]{4}-?[0-9]{4}$

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