Check if SharePoint Site Collection, Site, List, Document, Column Exists in PowerShell

Here is my nifty PowerShell scripts to check if a given URL of Site collection, Site, List, Document (File) and column objects exists in SharePoint. You can utilize these helper functions wherever required.

PowerShell to check if Site Collection Exists:
Here is my custom function and function usage with PowerShell to check if site collection exists. SharePoint PowerShell to check if site collection exists:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

#Custom Function to Check if Site Collection Exists in Given URL
Function Check-SiteExists($SiteURL)
{
    return (Get-SPSite $SiteURL -ErrorAction SilentlyContinue) -ne $null     
}

#Variable for Site collection
$SiteURL= "http://demo.crescent.com/sites/operations" 

#Call the function to check site exists
if(Check-SiteExists($SiteURL))
 {
    write-host "Yes, Given Site Collection Exists!" -f Green
    #Proceed with your script
 }
 else
 {
    write-host "No, Site Collection doesn't Exists on given URL!" -f Red
 }

Alternatively, you can try:

$SiteURL = "http://portal.crescent.com/"
 
try{ 
    $Site=Get-SPSite $SiteURL -ErrorAction SilentlyContinue
   }
catch{ 
    write-host Site Collection with URL:$SiteURL Does not Exists!
    return
 }  

PowerShell Script in to check if  SharePoint Subsite exists in given URL:

#Custom Function to Check subsite(Web) Exists or Not
Function Check-WebExists($WebURL)
{
    return (Get-SPWeb $WebURL -ErrorAction SilentlyContinue) -ne $null     
}

SharePoint PowerShell to Check If List Exists:

#Function to Check if List Exists 
Function Check-ListExists()
{
   Param( [Parameter(Mandatory=$true)] [string]$SiteURL, [Parameter(Mandatory=$true)] [string]$ListName ) 

   Return  (Get-SPWeb $SiteURL).lists.TryGetList($ListName) -ne $null
}

#Variable for Site collection
$varSiteURL= "http://intranet.crescent.com/sites/Sales"
$varListName = "Invoice"

#Call the function to check list exists
if(Check-ListExists -SiteURL $varSiteURL -ListName $varListName)
 {
    write-host "Yes, Given List do Exists!" 
    #Proceed with your script
 } 

Check if Site Column already exists using PowerShell
Lets check if site column exists using PowerShell:

#Function to Check if File Exists 
Function Check-SiteColumnExists()
{
   Param( [Parameter(Mandatory=$true)] [string]$SiteURL, [Parameter(Mandatory=$true)] [string]$ColumnName ) 

   Return  (Get-SPWeb $SiteURL).Fields.ContainsField($ColumnName) 
}

#Variable for Site collection
$varSiteURL= "http://intranet.crescent.com"
$varColumnName = "Department"

#Call the function to check list exists
if(Check-SiteColumnExists -SiteURL $varSiteURL -ColumnName $varColumnName)
 {
    write-host "Yes, Given Site Column do Exists!" 
    #Proceed with your script
 }

SharePoint PowerShell check document exists
and finally, lets check file exists in given location:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

#Function to Check if File Exists 
Function Check-FileExists()
{
   Param( [Parameter(Mandatory=$true)] [string]$SiteURL, [Parameter(Mandatory=$true)] [string]$FileURL ) 

   Return  (Get-SPWeb $SiteURL).GetFile($FileURL).Exists
}

#Variable for Site collection
$varSiteURL= "http://intranet.crescent.com"
$varFileURL = "http://intranet.crescent.com/Sales/Invoices/Inv-5060203.docx"

#Call the function to check list exists
if(Check-FileExists -SiteURL $varSiteURL -FileURL $varFileURL)
 {
    write-host "Yes, Given File do Exists!" 
    #Proceed with your script
 }