Regular Expressions 101

Group 1(^|[^0-9])

1st Alternative^

^start of line

2nd Alternative[^0-9]

Negated Character Class[^0-9]

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

Group 2($?0?[0-9]{2}$?)?

?repeats the group contents below at most once:

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

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[0-9]{2}

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

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

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

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

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 (32₁₀ / 40₈ / 20₁₆)

Character Class[0-9]{4}

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

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

Group 3([^0-9]|$)

1st Alternative[^0-9]

Negated Character Class[^0-9]

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

2nd Alternative$

$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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

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

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