Powershell, using contains to check if files contain a certain word

Question

I am trying to create a powershell script which looks through all files and folders under a given directory it then changes all instances of a given word in .properties file

Answer 1

Simplified contains clause

$file = Get-Content $_.FullName

if ((Get-Content $file | %{$_ -match $wordToFind}) -contains $true) {
    Add-Content log.txt $_.FullName
    ($file) | ForEach-Object { $_ -replace $wordToFind , $wordToReplace } | 
    Set-Content $_.FullName
}