#Define variables
$webappName = "http://bc01" 
# $webappName = "SharePoint - 80"
$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