3. Update Logo image to All Site collection under one Web Application

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

 $Site=Get-SPSite http://test:2222

 $SPWebApp = $Site.WebApplication

 #$SPWebApp = Get-SPWebApplication

foreach ($SPSite in $SPWebApp.Sites)

{

 $siteurl = Get-SPWeb $SPSite.Url

 $weburl=$SPSite.Url+ "/PublishingImages"

  write-host "$weburl"

#call the upload function

uploadimagefile $weburl "C:\Logo.GIF" "Background Process Upload" $true $true "Approved by background process"

#write-host "$siteurl"

}

# Note: for testing purposes, simply set $listUrl to a valid SharePoint Document Library and $file to the path of a local file to upload and then run the script

function uploadimagefile($listUrl,$file,$checkInComment,$publishMajorVersion,$approve,$approvalComment)

{

$destUri = $null

$localFile = get-item -LiteralPath $file

$site = $null

try {

# can we open the SharePoint site from the URL?

$destUri = [System.Uri]($listUrl)

write-output "Opening: $listUrl"

$site = [Microsoft.SharePoint.SPSite]($listUrl)

} catch {

$msg = $error[0].Exception.Message

write-output "Unable to open site '$ListUrl' - $msg"

exit 6

}

$queryParams = [System.Web.HttpUtility]::ParseQueryString($destUri.Query)

$folderPath = $queryParams["RootFolder"]

if ($folderPath -eq $null) {

$folderPath = $destUri.LocalPath

}

$web = $site.OpenWeb()

$folder = $null

$list = $null

$file = $null

$exitCode = 0

try {

$folder = $web.GetFolder($folderPath)

$list = $web.GetList($listUrl)

$bRequiresCheckIn = $false

if ($list -eq $null) { throw "Unable to open list" }

if ($folder -eq $null -or $folder.Exists -eq $false) { throw "Unable to open folder '$folderPath'" }

#if the library requires a check out, we must do that first

if ($list.ForceCheckout -eq $true) {

$folder.Files | %{

if ($_.Name -eq $localFile.Name) {

#if we have a match, check it out

if ($_.CheckOutType -ne "None") {

$_.UndoCheckOut()

}

$_.CheckOut()

$bRequiresCheckIn = $true

}

}

}

$stream = $localFile.OpenRead()

$newFile = $folder.Files.Add($folder.Url + "/" + $localFile.Name, $stream, $true, $checkInComment, $false)

$stream.Close()

if ($bRequiresCheckIn -eq $true -or $publishMajorVersion -eq $true) {

$revType = 0 # minor rev

if ($list.EnableVersioning -eq $true -and $publishMajorVersion -eq $true) { $revType = 1 }

if ($list.EnableVersioning -eq $false) { $revType = 2 }

if ($newFile.CheckOutType -eq "None") { $newFile.CheckOut() }

$newFile.CheckIn($checkInComment, $revType)

}

if ($list.EnableModeration -eq $true -and $approve -eq $true) {

$newFile.Approve($approvalComment)

}

Write-output "File Uploaded successfully"

} catch {

$msg = $error[0].Exception.Message

write-output "Unable to open list Url '$ListUrl' - $msg"

}

}