[cmdletbinding()]
Param(
  [ValidateScript({Test-Path $_})]
  [ValidateNotNullOrEmpty()]
  [Parameter(Mandatory=$True)]
  [string]$filePath,

  [Parameter(Mandatory=$True)]
  [ValidateNotNullOrEmpty()]
  [string]$replace,

  [Parameter(Mandatory=$True)]
  [ValidateNotNullOrEmpty()]
  [string]$with
)

$content = Get-Content $filePath

$updatedContent = $content -replace $replace, $with

Set-Content -Path $filePath -Value $updatedContent