Proposal for Improvement of ZF2 RND

gistfile1.php

/**
     * Generate random bytes using OpenSSL or Mcrypt and mt_rand() as fallback
     *
     * @param  integer $length
     * @param  bool $strong true if you need a strong random generator (cryptography)
     * @return string
     * @throws Exception\RuntimeException
     */
    public static function getBytes($length, $strong = false)
    {
        if ($length <= 0) {
            return false;
        }
        if (extension_loaded('openssl')) {
            $rand = openssl_random_pseudo_bytes($length, $secure);
            if ($secure === true) {
                return $rand;
            }
        }
        if (extension_loaded('mcrypt')) {
            // PHP bug #55169
            // @see https://bugs.php.net/bug.php?id=55169
            if (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN' ||
                version_compare(PHP_VERSION, '5.3.7') >= 0) {
                $rand = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
                if ($rand !== false && strlen($rand) === $length) {
                    return $rand;
                }
            }
        } 
        if ($strong) {
            throw new Exception\RuntimeException(
                'This PHP environment doesn\'t support secure random number generation. ' .
                'Please consider to install the OpenSSL and/or Mcrypt extensions'
            );
        }
        if (is_readable('/dev/urandom')) {
	    $seed = unpack('l', fread(fopen('/dev/urandom', 'r'), 4));
	    if (isset($seed[1])) {
	        mt_srand($seed[1]);
	    }
	}  
        $rand = '';
        for ($i = 0; $i < $length; $i++) {
            $rand .= chr(mt_rand(0, 255));
        }
        return $rand;
    }