regex101: PCRE (Legacy) Match Workspace

Pro

\ba Unicode word boundary

Group CASE_UPPER(?<CASE_UPPER>[[:upper:]]+)

Character Class[[:upper:]]+

+matches at least one character from the set below:

[:upper:]an uppercase letter \p{Lu}

Group CASE_MIXED(?<CASE_MIXED>[A-z]*[A-Z][A-z]*+)

Character Class[A-z]*

*matches any number of characters from the set below:

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

Character Class[A-Z]

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

Character Class[A-z]*+

*+matches any number of characters from the set below:

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

Group CASE_INITIALCAPS(?<CASE_INITIALCAPS>[A-Z][a-z]+[A-Z]*+)

Character Class[A-Z]

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

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]*+

*+matches any number of characters from the set below:

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

Group PHRASE(?<PHRASE>[A-Z][\w-]*\s+[A-Z][\w-]*+)

Character Class[A-Z]

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

Character Class[\w-]*

*matches any number of characters from the set below:

\wa Unicode word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s+a Unicode whitespace character, repeated at least once

Character Class[A-Z]

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

Character Class[\w-]*+

*+matches any number of characters from the set below:

\wa Unicode word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\ba Unicode word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

u modifier: unicode. Treats the pattern and subject as UTF-16

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

25 tokens

Regular Expression

    \b 
    (?<CASE_UPPER>[[:upper:]]+)
    (?<CASE_MIXED>[A-z]*[A-Z][A-z]*+)
    (?<CASE_INITIALCAPS>[A-Z][a-z]+[A-Z]*+)
    (?<PHRASE>[A-Z][\w-]*\s+[A-Z][\w-]*+)
    \b

I am testing to see if this works for UPPERCASE, InitialCase and mixedCase which of course is also mIxedcase. Firstword initial case should not be matched.  FirstWordMixed case should be. UPPERCASE first word should be. And of course phrases that combine any combination of UPPER mixEd Initicase should be pulled as a phrase not a word which could be of course Initcase1 Initcase2 Initcase3.  Finally it needs to match all sorto of Associations such as Association of First Words, Last Word for Association, Middle Word Association for Words.

Substitution

I am testing to see if this works for UPPERCASE, InitialCase and mixedCase which of course is also mIxedcase. Firstword initial case should not be matched.  FirstWordMixed case should be. UPPERCASE first word should be. And of course phrases that combine any combination of UPPER mixEd Initicase should be pulled as a phrase not a word which could be of course Initcase1 Initcase2 Initcase3.  Finally it needs to match all sorto of Associations such as Association of First Words, Last Word for Association, Middle Word Association for Words.