Regular Expressions 101

Explanation

Pro

1st Alternative^(([\d]{5})-([\d]{7})-([\d]{1}))

^start of line

Group 1(([\d]{5})-([\d]{7})-([\d]{1}))

Group 2([\d]{5})

Character Class[\d]{5}

{5}matches exactly 5 characters from the set below:

\da digit

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3([\d]{7})

Character Class[\d]{7}

{7}matches exactly 7 characters from the set below:

\da digit

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 4([\d]{1})

Character Class[\d]{1}

{1}matches one character from the set below:

\da digit

2nd Alternative(([\d]{5})([\d]{7})([\d]{1}))

Group 5(([\d]{5})([\d]{7})([\d]{1}))

Group 6([\d]{5})

Character Class[\d]{5}

{5}matches exactly 5 characters from the set below:

\da digit

Group 7([\d]{7})

Character Class[\d]{7}

{7}matches exactly 7 characters from the set below:

\da digit

Group 8([\d]{1})

Character Class[\d]{1}

{1}matches one character from the set below:

\da digit

3rd Alternative(([\d]{5}) ([\d]{7}) ([\d]{1}))$

Group 9(([\d]{5}) ([\d]{7}) ([\d]{1}))

Group 10([\d]{5})

Character Class[\d]{5}

{5}matches exactly 5 characters from the set below:

\da digit

the literal (32₁₀ / 40₈ / 20₁₆)

Group 11([\d]{7})

Character Class[\d]{7}

{7}matches exactly 7 characters from the set below:

\da digit

the literal (32₁₀ / 40₈ / 20₁₆)

Group 12([\d]{1})

Character Class[\d]{1}

{1}matches one character from the set below:

\da digit

$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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

27 tokens

Regular Expression

^(([\d]{5})-([\d]{7})-([\d]{1}))|(([\d]{5})([\d]{7})([\d]{1}))|(([\d]{5}) ([\d]{7}) ([\d]{1}))$

New

// Allow these: 
1234512345671
12345-1234567-1

// Don't Allow
12345 1234567-1
12345-1234567 1
12345123456718
12345-1234567-71
12345-12345678-1

Substitution

// Allow these: 
1234512345671
12345-1234567-1

// Don't Allow
12345 1234567-1
12345-1234567 1
12345123456718
12345-1234567-71
12345-12345678-1