Extract a substring using PowerShell

The -match operator tests a regex, combine it with the magic variable $matches to get your result

PS C:\> $x = "----start----Hello World----end----"
PS C:\> $x -match "----start----(?<content>.*)----end----"
True
PS C:\> $matches['content']
Hello World

Whenever in doubt about regex-y things, check out this site: http://www.regular-expressions.info

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