PRTG - Evaluate Json

param($url = "")

$values = ((Invoke-WebRequest $url) | ConvertFrom-Json)

$channel = @"
    <result>
        <channel>{0}</channel>
        <value>{1}</value>
    </result>
"@
#endregion

Write-Host "<?xml version='1.0' encoding='UTF-8' ?><prtg>"

# We can't evaluate those two channels.
$Values.PSObject.Properties.Remove('date')
$Values.PSObject.Properties.Remove('site')

$values | get-member -type NoteProperty | foreach-object {
  $name=$_.Name ;
  $value=$values."$($_.Name)"

  Write-Host ([string]::Format($channel,$name,$value))
}

Write-Host "</prtg>";