Regular Expressions 101

Pro

Non-Capturing Group(?:.+|)

1st Alternative.+

.+any character (except for line terminators), repeated at least once

2nd Alternative — matches an empty string

\ban ASCII word boundary

Group 1(fees|fee|charge|charges)

1st Alternativefees

feesthe literal text fees (case sensitive)

2nd Alternativefee

feethe literal text fee (case sensitive)

3rd Alternativecharge

chargethe literal text charge (case sensitive)

4th Alternativecharges

chargesthe literal text charges (case sensitive)

\ban ASCII word boundary

Non-Capturing Group(?:.+|)

1st Alternative.+

.+any character (except for line terminators), repeated at least once

2nd Alternative — matches an empty string

$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

(?:.+|)\b(fees|fee|charge|charges)\b(?:.+|)$

New

Anything else you wish fees credit card
Anything else you wish fee credit card
charges for interest
charge for interest
charger for device
coffee shop
feeder cattle

Substitution

\1\2

Anything else you wish fees credit card
Anything else you wish fee credit card
charges for interest
charge for interest
charger for device
coffee shop
feeder cattle