Backup the web.config for a given web application

BackupWebConfig.ps1

$webappName = “http://intranet.contoso.com” 
$backupDir = “C:\backups”

Write-Host "Backing up $webappName web.config file…" -foreground Gray –nonewline

## Get the web application – by display name 
$w = Get-SPWebApplication | where { $_.DisplayName -eq "$webappName"}

## Get the default (first) zone for the web app… 
## You may wish to iterate through all the available zones 
$zone = $w.AlternateUrls[0].UrlZone

## Get the collection of IIS settings for the zone 
$iisSettings = $w.IisSettings[$zone]

## Get the path from the settings 
$path = $iisSettings.Path.ToString() + "\web.config"

## copy the web.config file from the path 
copy-item $path -destination $backupDir\$webappName

Write-Host "done" -foreground Green