Regular Expressions 101

1st Alternative(?<!^)\b(?:the|an?|[io]n|at|with|from)\b(*SKIP)(*FAIL)

Negative Lookbehind(?<!^)

^start of line

\ban ASCII word boundary

Non-Capturing Group(?:the|an?|[io]n|at|with|from)

1st Alternativethe

thethe literal text the (case sensitive)

2nd Alternativean?

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

n?optionally matches the literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

3rd Alternative[io]n

Character Class[io]

ithe literal i (105₁₀ / 151₈ / 69₁₆) (case sensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

4th Alternativeat

atthe literal text at (case sensitive)

5th Alternativewith

withthe literal text with (case sensitive)

6th Alternativefrom

fromthe literal text from (case sensitive)

\ban ASCII word boundary

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*FAIL)forces the current match attempt to fail at this position

2nd Alternative\b(\pL)

\ban ASCII word boundary

Group 1(\pL)

\pLany Unicode letter

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

(?<!^)\b(?:the|an?|[io]n|at|with|from)\b(*SKIP)(*FAIL)|\b(\pL)

New

I like the pizza
the water in the pool