CODEWITHSUNDEEP
regexregex-group
PyNoob
PyNoob

Reputation: 223

Regex Match if present does not match a line

I have a set of strings coming in as:

I want to match it into 3 columns if Site*** presents at the start and if P*** presents in the end else match all of it

I am trying

^(.*)??(Site\S\s\d+\S\d+)?(.*)?\s(P.*?)$

But it is missing

How can I do it?

Regex: PCRE(PHP<7.3)

Upvotes: 0

Views: 51

Answers (2)

The fourth bird
The fourth bird

Reputation: 163457

You can also use an optional non capture group to not capture the space and make the pattern a bit more specific:

^(Site:\h\d+\.\d+)?(.+?)(?:\h(P.*))?$
  • ^ Start of string
  • (Site:\h\d+\.\d+)? Optional group 1, match Site: a space and digits . digits
  • (.+?) Capture group 2, match at last 1 or more times any char to not match an empty string
  • (?:\h(P.*))? Optional non capture group, match a space and capture P and 0+ times any char in group 3
  • $ End of string

Regex demo

Upvotes: 1

rorymac
rorymac

Reputation: 98

the last part, including \s needs to be optional to match the string without it

try

^(Site\S\s\d+\S\d+)?(.*?)((\s)P.*)?$

https://regex101.com/r/SuvUDb/1

Upvotes: 2

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