This is a slight modification of a script I found at PHPFAQ:

class Password
{
    static function generate($length)
    {
        srand((double)microtime()*1000000);

        $vowels = array("a", "e", "i", "o", "u");
        $cons = array("b", "c", "d", "g", "h", "j", "k", "l", "m", "n", "p", "r", "s", "t", "u", "v", "w", "tr",
        "cr", "br", "fr", "th", "dr", "ch", "ph", "wr", "st", "sp", "sw", "pr", "sl", "cl"); 

        $num_vowels = count($vowels);
        $num_cons = count($cons);

        $password = '';
        
        for($i = 0; $i < $length; $i++)
        {
            $password .= $cons[rand(0, $num_cons - 1)] . $vowels[rand(0, $num_vowels - 1)];
        }

        return substr($password, 0, $length);
    }
}

To use it try this code:

require 'password.php'

echo Password.generate(10);

It will spit out passwords that are semi-pronouncable.

ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub | ssh user@machine "cat >> ~/.ssh/authorized_keys"