1 # Check Email format
 2 Write-Host "Please input your email address"
 3 $email=Read-Host
 4 $regular="[a-zA-Z0-9]\@[a-zA-Z0-9]\.[a-zA-Z0-9]"
 5 if($email -match $regular)
 6 { write-host "Email is correct, pass!" -ForegroundColor Green
 7 }else{
 8 Write-Host "Email is wrong, waring!" -ForegroundColor Red
 9 }
10 
11 #-------------------------------------------------------------
12 
13 # Get the URL name extensions
14 Write-Host "Please input one URL"
15 $url=Read-Host
16 $extension=($url.Substring($url.LastIndexOf(".")+1))
17 Write-Host "The URL extension is:" $extension -ForegroundColor Green
18 
19 #------------------------------------------------------------
20 
21 # Get the previous time
22 $Now=Get-Date
23 $Now.AddDays(-1)                       # Yesterday
24 $Now.AddSeconds(-1)                    # previous second