Check if SharePoint Site exists using CSOM PowerShell

CheckSiteExists.ps1

function CheckSiteExists()
{
	param(
		[Parameter(Mandatory=$true)][string]$url
    )
    begin{
        $context = New-Object Microsoft.SharePoint.Client.ClientContext($url)                     
        $web = $context.Web            
        $context.Load($web) 
    

        try {
            $context.ExecuteQuery()
            return $true
        }
        catch {
            return $false
        }
    }
    end{
        $context.Dispose()
    }
}