Regular Expressions 101

Pro

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Positive Lookbehind(?<=\.(?<!\bst\.)(?!(?:com|org)\b))

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookbehind(?<!\bst\.)

\ban ASCII word boundary

stthe literal text st (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!(?:com|org)\b)

Non-Capturing Group(?:com|org)

1st Alternativecom

comthe literal text com (case insensitive)

2nd Alternativeorg

orgthe literal text org (case insensitive)

\ban ASCII word boundary

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

Negative Lookahead(?!$)

$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

Detailed match information will be displayed here automatically.

25 tokens

(?i)(?<=\.(?<!\bst\.)(?!(?:com|org)\b))\s*+(?!$)

New

here is an axample with cases like st. moris and google.com here. second sentence.

here is an axample with cases like st. moris and google.com here. second sentence.