Regular Expressions 101

Pro

^start of line

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

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

\da digit

Non-Capturing Group(?:(, ?| )(?:[A-Z\d]{6}\1)*[A-Z\d]{6} *)?

?repeats the group contents below at most once:

Group 1(, ?| )

1st Alternative, ?

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:[A-Z\d]{6}\1)*

*repeats the group contents below any number of times:

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

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

\da digit

\1the text saved by group 1

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

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

\da digit

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of 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

Regular Expression

^[A-Z\d]{6}(?:(, ?| )(?:[A-Z\d]{6}\1)*[A-Z\d]{6} *)?$

New

KEPM39, JEMGH5, HEPM21
KEPM39 JEMGH5 HEPM21
KEPM39,JEMGH5,HEPM21
JEPM34, KEPM11 
JEPM34, KEPM11
JEPM34


KEPM39, JEMGH5 HEPM21, HEGD44    ZZZZZZ
KEPM39, JEMGH5 HEPM21

Substitution

KEPM39, JEMGH5, HEPM21
KEPM39 JEMGH5 HEPM21
KEPM39,JEMGH5,HEPM21
JEPM34, KEPM11 
JEPM34, KEPM11
JEPM34


KEPM39, JEMGH5 HEPM21, HEGD44    ZZZZZZ
KEPM39, JEMGH5 HEPM21