regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

Negative Lookahead(?!\S*(?:more|enough|less)$)

\S*any non-whitespace character, repeated any number of times

Non-Capturing Group(?:more|enough|less)

1st Alternativemore

morethe literal text more (case sensitive)

2nd Alternativeenough

enoughthe literal text enough (case sensitive)

3rd Alternativeless

lessthe literal text less (case sensitive)

$end of line

Negative Lookahead(?!\S*?(more|enough|less)\S*?\1)

\S*?any non-whitespace character, repeated any number of times

Group 1(more|enough|less)

1st Alternativemore

morethe literal text more (case sensitive)

2nd Alternativeenough

enoughthe literal text enough (case sensitive)

3rd Alternativeless

lessthe literal text less (case sensitive)

\S*?any non-whitespace character, repeated any number of times

\1the text saved by group 1

Negative Lookahead(?!\S*?(?:more|enough|less)[^\s,]*?(?:more|enough|less))

\S*?any non-whitespace character, repeated any number of times

Non-Capturing Group(?:more|enough|less)

1st Alternativemore

morethe literal text more (case sensitive)

2nd Alternativeenough

enoughthe literal text enough (case sensitive)

3rd Alternativeless

lessthe literal text less (case sensitive)

Negated Character Class[^\s,]*?

*?matches any number of characters outside the set below:

\sany whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:more|enough|less)

1st Alternativemore

morethe literal text more (case sensitive)

2nd Alternativeenough

enoughthe literal text enough (case sensitive)

3rd Alternativeless

lessthe literal text less (case sensitive)

Non-Capturing Group(?:more|enough|less)

1st Alternativemore

morethe literal text more (case sensitive)

2nd Alternativeenough

enoughthe literal text enough (case sensitive)

3rd Alternativeless

lessthe literal text less (case sensitive)

Character Class[a-z_]*

*matches any number of characters from the set below:

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Non-Capturing Group(?:,(?:more|enough|less)[a-z_]*)*

$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

25 tokens

Regular Expression

^(?!\S*(?:more|enough|less)$)(?!\S*?(more|enough|less)\S*?\1)(?!\S*?(?:more|enough|less)[^\s,]*?(?:more|enough|less))(?:more|enough|less)[a-z_]*(?:,(?:more|enough|less)[a-z_]*)*$

New

My Regex works for nearly all combinations, except:

lesschips,lessfish
lesschipsmorebier_cold

For testing I use the following combinations:

morefish
morefish_fried
lesschips
morebier_cold,lesschips,enoughwater
lesschips,morebier_cold


... and the following invalid combinations:

 more
morefish 
 morefish
moreless
essmore
leschips
lesschips,lessfish
lesschipsmorebier_cold
morebier_cold,lesschips,enough