For example this is my text :

$str = 'buy new microsoft windows';

I explode text and list with array :

Array
(
    [0] => buy
    [1] => new
    [2] => microsoft
    [3] => windows
)

I want to generate words in array to something like this:

buy new
buy new windows
buy microsoft 
buy microsoft windows
buy windows
new microsoft
new microsoft windows
new windows
microsoft windows

I tried with foreach and rand but I couldn't generate like showed. Is there any chance to generate just like my request?

php cpu-word
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