Reading "exit code [0]" from a log file in powershell

Question

When an installation is successful the last line in the log file shows "exit code [0]" . I want to read that line using my script and get the result. I am able to read just the string "exit code" but its not able to read "[0]". Can someone pls suggest me how to read the whole thing "exit code [0]" as string

if ($textcode -imatch "exit code [0]")
{
Write-Host "Success"
}
else
{
Write-Host "Not Success"
}

Answer 1

The characters "[" and "]" together are used to denote a character class in regular expressions. The effect is that you're trying to match "exit code 0".

Alter your regex by escaping either the first, or both, of the "[" and "]" characters.

Here's an example:

'exit code [0]','exit code 0' |
    ForEach-Object{
        if ($_ -match 'exit code [0]'){Write-Host "'exit code [0]' matched '$_'"}
        if ($_ -match 'exit code \[0]'){Write "'exit code \[0]' matched '$_'"}
#        if ($_ -match 'exit code [0\]'){Write "'exit code [0\]' matched '$_'"}    ## THIS WILL FAIL!!!!
        if ($_ -match 'exit code \[0\]'){Write "'exit code \[0\]' matched '$_'"}
    }

If you escape only the "]" you'll get an error for having an "unterminated [] set"