Regular Expressions 101

Non-Capturing Group(?:\.(?![^.]+$)|[^\w\d\n.])+

+repeats the group contents below at least once:

1st Alternative\.(?![^.]+$)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?![^.]+$)

Negated Character Class[^.]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of line

2nd Alternative[^\w\d\n.]

Negated Character Class[^\w\d\n.]

\wany word character

\da digit

\na line-feed (newline) character (ASCII 10)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

(?:\.(?![^.]+$)|[^\w\d\n.])+

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