Code Snippet: Iterating thru all websites

How to iterate thru all SiteCollections and containing the Websites. This script also shows a progressbar on screen:

$sites = Get-SPSite -Limit All
$siteIter = 0
foreach($site in $sites) {
    Write-Progress -PercentComplete (($siteIter / $sites.Count) * 100) -Activity "Iteration Sites" -Status $site.HostName
    $webIter = 0
    
    # Do something here
    
    foreach($web in $site.AllWebs) {
        Write-Progress -PercentComplete (($webIter / $site.AllWebs.Count) * 100) -Activity "Iteration Webs" -Status $web.Title -Id 2
        Write-Host $web.Title
        $webIter++
        
        # Do something here
    }
    $siteIter++
}