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#AvoidGlobalVars Severity Level: Warning

##Description A variable is a unit of memory in which values are stored. Windows PowerShell controls access to variables, functions, aliases, and drives through a mechanism known as scoping. Variables and functions that are present when Windows PowerShell starts have been created in the global scope.

Globally scoped variables include:

  • Automatic variables
  • Preference variables
  • Variables, aliases, and functions that are in your Windows PowerShell profiles

To understand more about scoping, see Get-Help about_Scopes.

##How to Fix Use other scope modifiers for variables.

##Example ###Wrong:

$Global:var1 = $null
function Test-NotGlobal ($var)
{
	$a = $var + $var1
}

###Correct:

$var1 = $null
function Test-NotGlobal ($var1, $var2)
{
		$a = $var1 + $var2
}