Here is a way that you can reverse a string, not using any inbuilt automatic reverse methods etc.

  
$string = "Hello how are you today?"
  
$length = $string.Length
  
$reversed = ""

for ($i = $string.Length; $i -ge 0; $i-)
  
{$thing += $string[$i]}

$reversed

…


PS Z:\> C:\temp\scripts\test.ps1
  
?yadot uoy era woh olleH

PS Z:\>