Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:(?<prefix>[A-Z]+)[\s/-]*)?

?repeats the group contents below at most once:

Group prefix(?<prefix>[A-Z]+)

Character Class[A-Z]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[\s/-]*

*matches any number of characters from the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group number(?<number>\d{2,9})

\d{2,9}a digit, repeated between 2 and 9 times

Non-Capturing Group(?:[\s/-]*(?<suffix>[A-Za-z]+))?

?repeats the group contents below at most once:

Character Class[\s/-]*

*matches any number of characters from the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group suffix(?<suffix>[A-Za-z]+)

Character Class[A-Za-z]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Non-Capturing Group(?:[\s/-]*(?<joint>\d{1,2}))?

?repeats the group contents below at most once:

Character Class[\s/-]*

*matches any number of characters from the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group joint(?<joint>\d{1,2})

\d{1,2}a digit, repeated between 1 and 2 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

Detailed match information will be displayed here automatically.

25 tokens

^(?:(?<prefix>[A-Z]+)[\s/-]*)?(?<number>\d{2,9})(?:[\s/-]*(?<suffix>[A-Za-z]+))?(?:[\s/-]*(?<joint>\d{1,2}))?$

New

9999LI
JKB9999LI00
JKB/999-LI/0
9999 LI
JKB 999 LI 00
9999LI 0
9999LI1
JKB000009999LI01
JKB-999-LI-00

9999LI
JKB9999LI00
JKB/999-LI/0
9999 LI
JKB 999 LI 00
9999LI 0
9999LI1
JKB000009999LI01
JKB-999-LI-00