Passwords generated by this function

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Passwords generated by this function consists of hexadecimal numbers (0-9, A-F). They are also impossible to read and difficult to remember. bc923e42 bcff4cb3 1394f386 Proposed function ae_gen_password tries to generate readable easy-to-remember passwords, like following: lyttakor rixagist fapoution Algorithm is simple: we have an array of traditional English (in fact, of a latin and greek origin) prefixes (like kilo-, nano-, bio-, mini-, auto-, ...) and an array of common suffixes (like -tion, -ment, -or, ...). Beside prefix and suffixes-arrays, we have a list of a vowel and consonant sound-letters (letters that produce vowel and consonant sounds). To generate a password, we take random prefix(optionally), produce several simple syllables (one random consonant and one random vowel) and then select random suffix.


<?phpfunction ae_gen_password($syllables = 3, $use_prefix = false)
{

    // Define function unless it is already exists
    if (!function_exists('ae_arr'))
    {
        // This function returns random array element
        function ae_arr(&$arr)
        {
            return $arr[rand(0, sizeof($arr)-1)];
        }
    }

    // 20 prefixes
    $prefix = array('aero', 'anti', 'auto', 'bi', 'bio',
                    'cine', 'deca', 'demo', 'dyna', 'eco',
                    'ergo', 'geo', 'gyno', 'hypo', 'kilo',
                    'mega', 'tera', 'mini', 'nano', 'duo');

    // 10 random suffixes
    $suffix = array('dom', 'ity', 'ment', 'sion', 'ness',
                    'ence', 'er', 'ist', 'tion', 'or');

    // 8 vowel sounds
    $vowels = array('a', 'o', 'e', 'i', 'y', 'u', 'ou', 'oo');

    // 20 random consonants
    $consonants = array('w', 'r', 't', 'p', 's', 'd', 'f', 'g', 'h', 'j',
                        'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm', 'qu');

    $password = $use_prefix?ae_arr($prefix):'';
    $password_suffix = ae_arr($suffix);

    for($i=0; $i<$syllables; $i++)
    {
        // selecting random consonant
        $doubles = array('n', 'm', 't', 's');
        $c = ae_arr($consonants);
        if (in_array($c, $doubles)&&($i!=0)) { // maybe double it
            if (rand(0, 2) == 1) // 33% probability
                $c .= $c;
        }
        $password .= $c;
        //

        // selecting random vowel
        $password .= ae_arr($vowels);

        if ($i == $syllables - 1) // if suffix begin with vovel
            if (in_array($password_suffix[0], $vowels)) // add one more consonant
                $password .= ae_arr($consonants);

    }

    // selecting random suffix
    $password .= $password_suffix;

    return $password;
}?>