How can I tell if a specified folder is in my PATH using PowerShell?

A function like this would be great:

function FolderIsInPATH($Path_to_directory) {
    # If the directory is in PATH, return true, otherwise false
}

>Solution :

You can get your PATH using [Environment]::GetEnvironmentVariables()

[Environment]::GetEnvironmentVariables()

Or if you want to get the user environment variables:

[Environment]::GetEnvironmentVariables("User")

Next get the PATH variable:

$Path = [Environment]::GetEnvironmentVariables().Path # returns the PATH

Then check if the specified folder is in your PATH:

$Path.Contains($Path_to_directory + ";")

The function put together:

function FolderIsInPath($Path_to_directory) {
    return [Environment]::GetEnvironmentVariables("User").Path.Contains($Path_to_directory + ";")
}

However, this function is case-sensitive. You can use String.ToLower() to make it not case-sensitive.

function FolderIsInPath($Path_to_directory) {
    return [Environment]::GetEnvironmentVariables("User").Path.ToLower().Contains($Path_to_directory.ToLower() + ";")
}

Now call your function like this:

FolderIsInPath("C:\\path\\to\\directory")

Note that the path must be absolute.