CODEWITHSUNDEEP
regexpowershell
Abdelkrim Balaboula
Abdelkrim Balaboula

Reputation: 51

get ALL specified substring in powershell

I am trying to get "SubString One" AND "SubString two" the script I am using allows me to have the substring between substring , but :

1) only the first one substring and not all of them 2) Does not support multilines, which means I won't have "SubString One" in the example above

Help Please !

$a = " randomText <style>SubString One
</style>
another randomText   <style>SubString two </style>"

$pattern = "<style>(.*?)</style>"

$b = [regex]::Match($a,$pattern).Groups[1].Value

write-host $b

Upvotes: 1

Views: 56

Answers (1)

mklement0
mklement0

Reputation: 440297

  • Since your first <style> element spans two lines, you must turn on the SingleLine regex option in order to make . also match newlines (line breaks).

  • To find multiple matches in the input string, use the ::Matches() rather than the ::Match() method.

$a = " randomText <style>SubString One
</style>
another randomText   <style>SubString two </style>"

# Inline option (?s) (SingleLine) makes '.' match newlines.
$pattern = "(?s)<style>(.*?)</style>"

# Use ::Matches() and .ForEach() to extract the capture-group match
# from each match.
# .Trim() removes surrounding whitespace, notably the newline at the
# end of 'SubString One'
[regex]::Matches($a, $pattern).ForEach({ $_.Groups[1].Value.Trim() })

The above yields:

SubString One
SubString two

Upvotes: 2

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