How do you use bcrypt for hashing passwords in PHP?

Every now and then I hear the advice "Use bcrypt for storing passwords in PHP, bcrypt rulllez!!!11"

Secure hash and salt for PHP passwords

It is currently said that MD5 is partially unsafe. Taking this into consideration, I'd like to know which mechanism to use for password protection.

Why is char[] preferred over string for passwords?

In Swing , the password field has a getPassword() (returns char[] ) method instead of the usual getText() (returns String ) method. Similarly, I have come across a suggestion not to use String s to handle passwords. Why does String pose a threat to security when it comes to passwords?

How to use the case-sensitive for MySQL password field?

I have user login but user can login with case-insensitive way Means if your password is 'test' then user able to login with 'TEST' password. i want to avoid the such type authentication on my password field

Better way save password in mysql which can be decrypted also using php

I am currently using md5 function to encrypt my password and save to mysql db which can not be decrypted.

Strong Password for KeyStore

I am developing android apps on my very personal computer.