Get SharePoint list of users using powershell commands

First go to server roles -> Click on Features -> Click on add features -> Select windows powershell integrated scripting environment ISE and install it.

Go to Run -> powershell ise

In the last pane(ex: PS....) will come execute below command :

Set-Execution Policy remotesigned

In the first pane copy script as per your requirements and finally copy function calls - if first code executing run first command and mention your URL in http://sp2013 location. 

If it is second script then enter run second  

Attached script will be used to fetch list of all users on SharePoint site and also on any specific list using PowerShell script. Script consits of two functions

GetSPWebUsers

Using this, you can get list of all site users, it will take single parameter (i.e site URL).

PowerShell

function GetSPWebUsers($SiteCollectionURL) 
{ 
    [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") > $null 
    $site = new-object Microsoft.SharePoint.SPSite($SiteCollectionURL) 
    $web = $site.openweb() 
    $siteUsers = $web.SiteUsers 
 
    foreach($user in $siteUsers) 
    {        
        Write-Host " ------------------------------------- " 
        Write-Host "Site Collection URL:", $SiteCollectionURL 
        if($user.IsSiteAdmin -eq $true) 
        { 
            Write-Host "ADMIN: ", $user.LoginName 
        } 
        else 
        { 
            Write-Host "USER: ", $user.LoginName 
        } 
        Write-Host " ------------------------------------- " 
    }    
    $web.Dispose() 
    $site.Dispose() 
} 
 

GetSPAllSPUsers

This function will return list of all users and their permission set for any list/library. This can be used to check users permissions for against a list. This function have two parameters(i.e. site URL and List Name).

PowerShell

function GetSPAllSPUsers($SiteCollectionURL,$SPListName) 
{ 
    [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") > $null 
    $site = new-object Microsoft.SharePoint.SPSite($SiteCollectionURL)     
    $web = $site.openweb() 
    $list = $web.Lists[$SPListName] 
    $siteCollUsers = $web.SiteUsers 
     
    foreach($user in $siteCollUsers) 
        { 
            Write-Host " ------------------------------------- " 
            Write-Host "Site Collection URL:", $SiteCollectionURL 
            if($list.DoesUserHavePermissions([Microsoft.SharePoint.SPBasePermissions]::ViewListItems,$user) -eq $true) 
                { 
                    Write-Host "User : ", $user.LoginName 
                    Write-Host "Assigned Permissions : ", $list.GetUserEffectivePermissions($user.LoginName) 
                }             
            Write-Host " ------------------------------------- "         
        } 
     
        $web.Dispose() 
        $site.Dispose() 
 } 

Function Calls

Functins can be called as below

PowerShell

GetSPWebUsers "http://SP2013" 
GetSPAllSPUsers "http://sp2013:1111" "List Name"