Regular Expressions 101

Explanation

Pro

Negative Lookbehind(?<!\bIf\sI\s)

\ba Unicode word boundary

Ifthe literal text If (case sensitive)

\sa Unicode whitespace character

Ithe literal I (73₁₀ / 111₈ / 49₁₆) (case sensitive)

\sa Unicode whitespace character

\ba Unicode word boundary

recallthe literal text recall (case sensitive)

Non-Capturing Group(?:s|ed)?

?repeats the group contents below at most once:

1st Alternatives

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

2nd Alternativeed

edthe literal text ed (case sensitive)

\ba Unicode word boundary

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?<!\bIf\sI\s)\brecall(?:s|ed)?\b

New

Hi, I am talking about a recall on the product I bought last month. If I recall correctly, I purchased this at your store on august 15th. Can you tell me if I can get a refund on this recall?

Extraction

Hi, I am talking about a recall on the product I bought last month. If I recall correctly, I purchased this at your store on august 15th. Can you tell me if I can get a refund on this recall?