Regular Expressions 101

firstthe literal text first (case sensitive)

Non-Capturing Group(?:(?!and)[^;,.])*

*repeats the group contents below any number of times:

Negative Lookahead(?!and)

andthe literal text and (case sensitive)

Negated Character Class[^;,.]

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

secondthe literal text second (case sensitive)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

first(?:(?!and)[^;,.])*second

New

I would like it to match the following:
first some word second

But not match the following:

first . some word second
first ; some word second

It is working but it is also excluding the following:

blah ; first some word second