Regex to capture sequence of digits not starting with a string

user_10555770 0
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I need to write a regex to capture all numbers being at least 9 digits and not preceded by REQ or INC substrings.

Some examples of what I want:

1234567890 -> match -> 1234567890 
INC1234567890  -> not matching
REQ1234567890  -> not matching
IN1234567890  -> match -> 1234567890

What I tried so far:

(?<!(?:REQ|INC))(\d{9,})

But then my results are the following:

1234567890 -> match -> 1234567890 
INC1234567890  -> match -> 234567890
REQ1234567890  -> match -> 234567890
IN1234567890  -> match -> 1234567890

I tried playing around with \b but did not achieve anything.

regex
1 Answers

You can use

(?<!REQ|INC|\d)\d{9,}

See the regex demo

Details

  • (?<!REQ|INC|\d) - no REQ, INC or digit allowed immediately on the left
  • \d{9,} - nine or more digits.
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