Powershell: Filter the contents of a file by an array of strings

Question

Riddle me this:

I have a text file of data. I want to read it in, and only output lines that contain any string that is found in an array of search terms.

If I

Answer 1

without regex and with spaces possible:

$array = @("foo", "bar", "hello world")
get-content afile | where { foreach($item in $array) { $_.contains($item) } } > FilteredContent.txt