PHP5从cidr前缀计算IPv6范围 - IP地址数

Is it possible to add in the function on page below -

PHP5 calculate IPv6 range from cidr prefix?

that it additional return number of ip addresses/hosts in CIDR also:

• Prefix: $prefix
• First IP: $firstaddrstr
• Last IP: $lastaddrstr
• and need "Number of IP Addresses/Hosts: ..."