Regular Expressions 101

Explanation

Pro

^start of line

Negated Character Class[^- ']

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Positive Lookahead(?=(?![A-Z]?[A-Z]))

Negative Lookahead(?![A-Z]?[A-Z])

Character Class[A-Z]?

?matches at most one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=(?![a-z]+[A-Z]))

Negative Lookahead(?![a-z]+[A-Z])

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=(?!.*[A-Z][A-Z]))

Negative Lookahead(?!.*[A-Z][A-Z])

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

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Positive Lookahead(?=(?!.*[- '][- '.]))

Negative Lookahead(?!.*[- '][- '.])

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

Character Class[- ']

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Character Class[- '.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Positive Lookahead(?=(?!.*[.][-'.]))

Negative Lookahead(?!.*[.][-'.])

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

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[-'.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[A-Za-z- '.]{2,}

{2,}matches at least 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

$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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^[^- '](?=(?![A-Z]?[A-Z]))(?=(?![a-z]+[A-Z]))(?=(?!.*[A-Z][A-Z]))(?=(?!.*[- '][- '.]))(?=(?!.*[.][-'.]))[A-Za-z- '.]{2,}$

New

Tyue' Tgshh
CxCx5C5C
STEVE SMITH
Stev3 Smith
STeve Smith
Steve SMith
Steve Sm1th
Steve G. Smith
d'Are to Beaware
Jo Blow
Hyoung Kyoung Wu
Mike O'Neal
Steve Johnson-Smith
Jozef-Schmozev Hiemdel
O Henry Smith
Mathais d'Arras
Martin Luther King Jr
Downtown-James Brown
Darren McCarty
An Ni
O. Henry McCarty
George De FunkMaster
Kurtis B-Ball Basketball
Ahmad el Jeffe
John  Smith
'John Smith

Substitution

Tyue' Tgshh
CxCx5C5C
STEVE SMITH
Stev3 Smith
STeve Smith
Steve SMith
Steve Sm1th
Steve G. Smith
d'Are to Beaware
Jo Blow
Hyoung Kyoung Wu
Mike O'Neal
Steve Johnson-Smith
Jozef-Schmozev Hiemdel
O Henry Smith
Mathais d'Arras
Martin Luther King Jr
Downtown-James Brown
Darren McCarty
An Ni
O. Henry McCarty
George De FunkMaster
Kurtis B-Ball Basketball
Ahmad el Jeffe
John  Smith
'John Smith