$chars = array
(
    ' ',
    '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/',
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
    ':', ';', '<', '=', '>', '?', '`',
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
    '{', '|', '}', '~'
);

With the characters from the $chars array, I would like to find all possible combinations, for a length up to $n.

**For Example**:
It should start off with ' ', and then go to '!'.
Once it gets to the end of the $chars array (`~`) it should add on another charter.
Run though those combinations ('! ', '" ', ... '~ ', ' !' ... '~~', '   ', ect).
And then just keep on going ...