Regular Expressions 101

Group 1(\b(pre1|pre2)?WORD(suf1|suf2)?\b)

\ban ASCII word boundary

Group 2(pre1|pre2)?

?repeats the group contents below at most once:

1st Alternativepre1

pre1the literal text pre1 (case sensitive)

2nd Alternativepre2

pre2the literal text pre2 (case sensitive)

WORDthe literal text WORD (case sensitive)

Group 3(suf1|suf2)?

?repeats the group contents below at most once:

1st Alternativesuf1

suf1the literal text suf1 (case sensitive)

2nd Alternativesuf2

suf2the literal text suf2 (case sensitive)

\ban ASCII word boundary

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.

Search reference

Regular Expression

(\b(pre1|pre2)?WORD(suf1|suf2)?\b)

Test String
New

1. Xxx xxx WORDsuf1 xxx xxx xxx.
2. Xxx xxx WORDsuf2 xxx xxx xxx.
3. Xxx xxx pre1WORDsuf1 xxx xxx xxx.
4. Xxx xxx WORD xxx xxx xxx.
5. Xxx xxx pre1WORD xxx xxx xxx.
6. Xxx xxx pre2WORDxxx xxx xxx xxx.
7. Xxx xxx xxxWORDxxx xxx xxx xxx.
8. Xxx xxx pre1WORDxxxsuf1 xxx xxx xxx.
9. Xxx xxx pre1xxxWORDsuf1 xxx xxx xxx.
10. Xxx xxx xxxWORDxxx xxx xxx xxx.

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...