Regular Expressions 101

Pro

Group 1(<<)

<<the literal text <<

Group 2(TAG##X#(?<x>.+?)(##Y#(?<y>.+))?)

TAG##X#the literal text TAG##X# (case sensitive)

Group x(?<x>.+?)

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

Group 4(##Y#(?<y>.+))?

?repeats the group contents below at most once:

##Y#the literal text ##Y# (case sensitive)

Group y(?<y>.+)

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

Group 6(>>)

>>the literal text >>

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

(<<)(TAG##X#(?<x>.+?)(##Y#(?<y>.+))?)(>>)

New

<<TAG##X#123##Y#456>>

<<TAG##X#123##Y#456>>