Regular Expressions 101

Positive Lookbehind(?<=\p{L}(?: +|\. *)|^)

1st Alternative\p{L}(?: +|\. *)

\p{L}any Unicode letter

Non-Capturing Group(?: +|\. *)

1st Alternative +

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

2nd Alternative\. *

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

2nd Alternative^

^start of line

Hansenthe literal text Hansen (case sensitive)

Non-Capturing Group(?:s?[- ]\p{L}|$)

1st Alternatives?[- ]\p{L}

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Character Class[- ]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

\p{L}any Unicode letter

2nd Alternative$

$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

u modifier: unicode. Enables Unicode-aware matching and escape syntax

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=\p{L}(?: +|\. *)|^)Hansen(?:s?[- ]\p{L}|$)

New

shouldMatchCases
Hansen
Studio Hansen
Hansen-studio
Hansen studio
N.Hansen studio
N.Hansen-studio
N Hansens studio
N Hansen studio

These are the case that should not match.
Hansenssutdio
Hansenstest
Hansenxxx
NormanHansen
Hansen-
Hansens
Hansensd

Regular Expression

Substitution