Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:[+]6)?

?repeats the group contents below at most once:

Character Class[+]

+the literal + (43₁₀ / 53₈ / 2B₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Group 1(([0-9]{2}((\s[0-9]{3,4}\s[0-9]{4})|(-[0-9]{3,4}\s[0-9]{4})|(-[0-9]{7,8})))|([0-9]{9,10}))

1st Alternative([0-9]{2}((\s[0-9]{3,4}\s[0-9]{4})|(-[0-9]{3,4}\s[0-9]{4})|(-[0-9]{7,8})))

Group 2([0-9]{2}((\s[0-9]{3,4}\s[0-9]{4})|(-[0-9]{3,4}\s[0-9]{4})|(-[0-9]{7,8})))

Character Class[0-9]{2}

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

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

Group 3((\s[0-9]{3,4}\s[0-9]{4})|(-[0-9]{3,4}\s[0-9]{4})|(-[0-9]{7,8}))

1st Alternative(\s[0-9]{3,4}\s[0-9]{4})

Group 4(\s[0-9]{3,4}\s[0-9]{4})

\sany whitespace character

Character Class[0-9]{3,4}

{3,4}matches between 3 and 4 characters from the set below:

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

\sany whitespace character

Character Class[0-9]{4}

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

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

2nd Alternative(-[0-9]{3,4}\s[0-9]{4})

Group 5(-[0-9]{3,4}\s[0-9]{4})

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{3,4}

{3,4}matches between 3 and 4 characters from the set below:

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

\sany whitespace character

Character Class[0-9]{4}

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

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

3rd Alternative(-[0-9]{7,8})

Group 6(-[0-9]{7,8})

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{7,8}

{7,8}matches between 7 and 8 characters from the set below:

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

2nd Alternative([0-9]{9,10})

Group 7([0-9]{9,10})

Character Class[0-9]{9,10}

{9,10}matches between 9 and 10 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

Unit Test Summary

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Quick Reference

25 tokens

Regular Expression

^(?:[+]6)?0(([0-9]{2}((\s[0-9]{3,4}\s[0-9]{4})|(-[0-9]{3,4}\s[0-9]{4})|(-[0-9]{7,8})))|([0-9]{9,10}))$

Unit Tests

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