I'm working on a website that should be very safe for the users, so I need the hash the passwords. Usually I'm using the MD5, but I read that it doesn't safe anymore. So I tried PHPass, but then I read that it also has been cracked. So I tried `password_hash()` of PHP 5.5, but I use HostGator, and the PHP there is 5.4. Also I want to be able to add salt without knowing it (like `time() * userid()`), like in the `password_hash()`. 

The hash strength is very important to me because I want to be 100% sure that my users are safe. So is there a way that very safe and not something like SHA that will be hacked soon?