Regular Expressions 101

Pro

Positive Lookahead(?=.*/pdf/)

.*any character (except for line terminators), repeated any number of times

/pdf/the literal text /pdf/ (case sensitive)

Negative Lookahead(?!.*help)

.*any character (except for line terminators), repeated any number of times

helpthe literal text help (case sensitive)

Group 1(.+)

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

Detailed match information will be displayed here automatically.

25 tokens

(?=.*/pdf/)(?!.*help)(.+)

New

Shouldn't match: "/dealer/help/us/en/pdf/simple.pdf"
Should match: "/dealer/us/en/pdf/simple.pdf"

Shouldn't match: "/dealer/help/us/en/pdf/simple.pdf"
Should match: "/dealer/us/en/pdf/simple.pdf"