Calling function from inside function using powershell

Question

In my powershell script, I am using following code, first time it will go in another function and returns back original function, but in next time in loop, it open popup "Process [0]" and asking for input. I want my second function runs for each
site collection. Let me know what I am missing.
function test {
# Get site objects
$site = Get-SPWeb "http://l-1562571"
write-host $site.Url
#Call Function
$admin = AddLevel123($site.Url)
# Walk through each site in the site collection
$site.Url | Get-SPWeb -Limit all | ForEach-Object
$admin = AddLevel($site.Url)
function AddLevel($site)
param([uri]$site)
$web = get-spweb $site
#Dispos off web/site object.
if ($web -ne $null)
$web.Dispose()

Answer 1

First thing It seems you there is typo in method name. Anyway better should use like this. It is more easy and straight forward. Hope this helps you
# Get site objects
$webapplication = Get-SPWebApplication "http://l-1562571"
# Walk through each site in the site collection
foreach($site in $webapplication.Sites)
foreach($subWeb in $site.AllWebs)
$_ = AddLevel123($subWeb.Url)