regex101: PCRE2 (PHP) Match Workspace

\s*any whitespace character, repeated any number of times

Group 1([:,.])

Character Class[:,.]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!(?<=ό,)τι)

Positive Lookbehind(?<=ό,)

ό,the literal text ό, (case sensitive)

τιthe literal text τι (case sensitive)

Negative Lookahead(?!(?<=\d.)\d)

Positive Lookbehind(?<=\d.)

\da digit

.any character (except for line terminators)

\da digit

Negative Lookahead(?!\s*<br\s*/>)

\s*any whitespace character, repeated any number of times

<brthe literal text <br (case sensitive)

\s*any whitespace character, repeated any number of times

/>the literal text />

\s*any whitespace character, repeated any number of times

Global pattern flags

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

Search reference

Regular Expression

\s*([:,.])(?!(?<=ό,)τι)(?!(?<=\d.)\d)(?!\s*<br\s*/>)\s*

New

Composition:80% Polyamide,   15% Elastane, 5% Wool.
Side length 50.5 cm <---- THIS SHOULDN'T BE MATCHED
Value 4,500 <---- THIS SHOULDN'T BE MATCHED EITHER

ό,τι <---- THIS IS A FIXED PHRASE IN GREEK AND THEREFORE SHOULDN'T BE MATCHED
Comfort and timeless design characterize the Puma Smash V2 made of suede leather. They can be worn all the time ,being a unique choice for those who want to stand out .Made of rubber.<br />- Softfoam floor<br />- Binding with laces

Specs:<br />&bull; Something<br /><br />&bull; Something else<br />&bull; One more

Children's Form Champion<br /><br />Children's set that will give a comfortable feeling for endless hours of play.<br />It consists of a cardigan and trousers ,made of soft fabric and have rib cuffs and legs for a better fit.<br /><br />&bull; Normal fit<br /><br />&bull; Cardigan  :Rib cuffs, zippers throughout length, high neck, Champion logo <br /> <br />&bull; Pants: Elastic waist with drawstring, ribbed legs, Champion logo