PHP RDG

/**
     *   A method to generate randomized data for example salting or session keys
     *  @param integer $length DESCRIPTION: used to set a length that key should have
     *  @param boolean $base64encode OPTIONAL DESCRIPTION: if true it will use base64_encode() on the return data
     *  @param boolean $isSalt OPTIONAL DESCRIPTION: if true it will base64_encode() on the return data and will truncate the size to 22
     *  @return string $value DESCRIPTION: returns the randomized data
     */

    function generator($length, $base64encode = false, $isSalt = false){

        if(!is_integer($length)){
            trigger_error("Length variable must be an integer; ".gettype($length)." given", E_USER_ERROR);
        }

        if(!is_bool($base64encode)){
            trigger_error("base64encode variable must be a boolean; ".gettype($base64encode)." given", E_USER_ERROR);
        }

        if(!is_bool($isSalt)){
            trigger_error("isSalt variable must be a boolean; ".gettype($base64encode)." given", E_USER_ERROR);
        }

        if($isSalt){
            $base64encode = true;
        }

        if(function_exists('mcrypt_create_iv')){
            $value = @mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
            if($value == null || $value == false || $value == ""){
                $value = @mcrypt_create_iv($length, MCRYPT_DEV_RANDOM);
                if($value == null || $value == false || $value == ""){
                    trigger_error("MCRYPT_DEV_RANDOM and/or MCRYPT_DEV_URANDOM are/is not available", E_USER_ERROR);
                }
            }
            //return $value;
        }else if(function_exists('openssl_random_pseudo_bytes')){
            $value = openssl_random_pseudo_bytes($length);
            if($value == null || $value == false || $value == ""){
                trigger_error("openssl_random_pseudo_bytes is not available", E_USER_ERROR);
            }

        }else{
            trigger_error("mcrypt_create_iv and openssl_random_pseudo_bytes are not available", E_USER_ERROR);
        }

        if($base64encode){
            $value = rtrim(base64_encode($value), "=");
        }

        if($isSalt){
            $value = substr($value, 0, 22);
            if(strlen($value) <> 22){
                trigger_error("The salt length must be 22", E_USER_ERROR);;
            }
        }

        return $value."<hr />".strlen($value);
    }