Powershell Script to Find Specific user Permission for a SharePoint Site

This PowerShell script lists the permission for the given user under a given site collection.

$LogTime = Get-Date -Format yyyy-MM-dd_hh-mm
$LogFile = ".\UserPermissionsDetailsPatch-$LogTime.rtf"
# Add SharePoint PowerShell Snapin
if ( (Get-PSSnapin -Name Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue) -eq $null ) {
Add-PSSnapin Microsoft.SharePoint.Powershell
}
$scriptBase = split-path $SCRIPT:MyInvocation.MyCommand.Path -parent
Set-Location $scriptBase
#Deleting any .rtf files in the scriptbase location
$FindRTFFile = Get-ChildItem $scriptBase\*.* -include *.rtf
if($FindRTFFile)
{
foreach($file in $FindRTFFile)
{
remove-item $file
}
}
start-transcript $logfile
$siteCollection = read-host "Enter the site collection URL "
$username = read-host "Enter the user name (e.g: domain\username) "
$site = get-spsite $siteCollection
foreach($web in $site.allwebs)
{
#Check if the user is site collection administrator
$getuser = get-spuser -identity $username -web $web.url
if($getuser.issiteadmin)
{
write-host "The user " $username " is a site collection administrator" -for green
}
$permissionInfo = $web.GetUserEffectivePermissionInfo($Username)
$roles = $permissionInfo.RoleAssignments
write-host "Now checking the permissions of the user " $Username " in the site " $web.Url -fore yellow
for ($i = 0; $i -lt $roles.Count; $i++)
{
$bRoles = $roles[$i].RoleDefinitionBindings
foreach ($roleDefinition in $bRoles)
{
if ($roles[$i].Member.ToString().Contains('\'))
{
write-host "The User " $username " has direct permissions " $roleDefinition.Name -fore green
}
else
{
write-host "The User " $username " has permissions " $roleDefinition.Name " given via " $roles[$i].Member.ToString() -fore green
}
}
}
}