Powershell - Find files using regular expressions

Supports all PS versions

Get-ChildItem does not support advanced filtering of files. It can only use simple wildcards, but not regular expressions.

Revolving around this problem, we can use the -match command to filter.

The following example will obtain all files in the windows directory that contain at least two consecutive numbers and the file name length does not exceed 8 characters:

Get-ChildItem -Path $env:windir -Recurse -ErrorAction SilentlyContinue |
 Where-Object { $_.BaseName -match '\d{2}' -and $_.Name.Length -le 8 }

Pay attention to the file The attribute "BaseName" does not include the extension, so numbers appearing in the extension will not be counted.

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