Regular Expressions 101

Explanation

Pro

1st Alternative\b(?:\w+\W+){0,20}(?:BADWORD1|BAD2)\b(?:\W+\w+){0,20}

\ba Unicode word boundary

Non-Capturing Group(?:\w+\W+){0,20}

{0,20}repeats the group contents below between 0 and 20 times:

\w+a Unicode word character, repeated at least once

\W+any character that is not a Unicode word character, repeated at least once

Non-Capturing Group(?:BADWORD1|BAD2)

1st AlternativeBADWORD1

BADWORD1the literal text BADWORD1 (case insensitive)

2nd AlternativeBAD2

BAD2the literal text BAD2 (case insensitive)

\ba Unicode word boundary

Non-Capturing Group(?:\W+\w+){0,20}

{0,20}repeats the group contents below between 0 and 20 times:

\W+any character that is not a Unicode word character, repeated at least once

\w+a Unicode word character, repeated at least once

2nd Alternative\b(PRIMARY1|P2|P3)\b

\ba Unicode word boundary

Group 1(PRIMARY1|P2|P3)

1st AlternativePRIMARY1

PRIMARY1the literal text PRIMARY1 (case insensitive)

2nd AlternativeP2

P2the literal text P2 (case insensitive)

3rd AlternativeP3

P3the literal text P3 (case insensitive)

\ba Unicode word boundary

3rd Alternative\b(SECONDARY1|S2|S3)\W+(?:\w+\W+){0,20}(TERTIARY1|T2|T3)\b

\ba Unicode word boundary

Group 2(SECONDARY1|S2|S3)

1st AlternativeSECONDARY1

SECONDARY1the literal text SECONDARY1 (case insensitive)

2nd AlternativeS2

S2the literal text S2 (case insensitive)

3rd AlternativeS3

S3the literal text S3 (case insensitive)

\W+any character that is not a Unicode word character, repeated at least once

Non-Capturing Group(?:\w+\W+){0,20}

{0,20}repeats the group contents below between 0 and 20 times:

\w+a Unicode word character, repeated at least once

\W+any character that is not a Unicode word character, repeated at least once

Group 3(TERTIARY1|T2|T3)

1st AlternativeTERTIARY1

TERTIARY1the literal text TERTIARY1 (case insensitive)

2nd AlternativeT2

T2the literal text T2 (case insensitive)

3rd AlternativeT3

T3the literal text T3 (case insensitive)

\ba Unicode word boundary

4th Alternative\b(TERTIARY1|T2|T3)\W+(?:\w+\W+){0,20}(SECONDARY1|S2|S3)\b

\ba Unicode word boundary

Group 4(TERTIARY1|T2|T3)

1st AlternativeTERTIARY1

TERTIARY1the literal text TERTIARY1 (case insensitive)

2nd AlternativeT2

T2the literal text T2 (case insensitive)

3rd AlternativeT3

\W+any character that is not a Unicode word character, repeated at least once

Non-Capturing Group(?:\w+\W+){0,20}

Group 5(SECONDARY1|S2|S3)

\ba Unicode word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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Quick Reference

25 tokens

Regular Expression

\b(?:\w+\W+){0,20}(?:BADWORD1|BAD2)\b(?:\W+\w+){0,20}|\b(PRIMARY1|P2|P3)\b|\b(SECONDARY1|S2|S3)\W+(?:\w+\W+){0,20}(TERTIARY1|T2|T3)\b|\b(TERTIARY1|T2|T3)\W+(?:\w+\W+){0,20}(SECONDARY1|S2|S3)\b

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