PowerShell script to deploy Multiple Sandbox solutions

Applies to SPFoundation 2010, SP 2010, SPFoundation 2013,SP 2013

Points to be noted:
1. Replace $siteURL with url
2. All wsps should be in the current directory of the script (.ps1)

Add-PsSnapin Microsoft.SharePoint.PowerShell
$logfile=$CurrentDir + "\log.log"
$siteURL = "xxxxxxx"
Start-Transcript $logfile
#Do not modify anything in the script from here onwards
function Get-ScriptDirectory
{
 $Invocation = (Get-Variable MyInvocation -Scope 1).Value
 Split-Path $Invocation.MyCommand.Path
}
function Deploy-Solution{
param(
[string]$physicalPath,
[string]$name)
$SolutionName = $name
$SolutionPath = Join-Path ($physicalPath) $SolutionName
echo "Extracting information from $physicalPath"
$Solution = Get-SPUserSolution -site $siteURL | Where { ($SolutionName -eq $_.Name) }  -ErrorAction SilentlyContinue
if ($Solution -ne $null)
{
    if($Solution.Status -eq "Activated")
    {
    Write-Host 'Poweshell Script will now retract solution:' $SolutionName
    Uninstall-SPUserSolution -Identity $SolutionName -Site $SiteURL -Confirm:$false
    Write-Host 'Successfully retracted solution:' $SolutionName
    }
    Write-Host 'Removing Solution:' $SolutionName
    Remove-SPUserSolution -Identity $SolutionName -Site $siteURL -Confirm:$false
    Write-Host 'Successfully removed Solution:' $SolutionName
}
Write-Host 'Poweshell Script will now add solution:' $SolutionName
Add-SPUserSolution –LiteralPath $SolutionPath -Site $SiteURL
Write-Host 'Poweshell Script will now deploy solution:' $SolutionName
Install-SPUserSolution -Identity $SolutionName -Site $SiteURL
Write-Host 'Poweshell Script has finished deployment of solution:' $SolutionName
}
#Get Current Physical Path
$currentPhysicalPath = Get-ScriptDirectory
#Iterate through all .wsp files in the current Physical Path to deploy solution
get-childitem $currentPhysicalPath -include *.wsp -recurse | foreach ($_) {Deploy-Solution $currentPhysicalPath $_.name}
Stop-Transcript
#Remove SharePoint Snapin
Remove-PsSnapin Microsoft.SharePoint.PowerShell

Echo Finish