There are numerous articles on the web about how to properly use bcrypt in PHP. So this time, rather than write yet-another-how-to-use-bcrypt article, I'm going to focus on the mistakes that are commonly made when implementing bcrypt.

Here's the list of seven ways (each has its own description in the post):

• Using A Non-Random Salt
• Using An Incorrect Random Source for Salt Generation
• Using Too Weak Of A Cost Parameter
• Using The Wrong PHP Version
• Using The Wrong Prefix
• Not Checking For Errors
• Not Using A Library

He also includes two "bonus" things to consider: "Not Using A Timing Safe Comparison" and "Not Encoding The Salt Correctly".