title: best way to store sensitive data php encryption
body: <p>Hello so obviously this is not a question with code, I am very familiar with salt and md5 encryption in php. But I need a safe way to store sensitive information in mysql.
  using md5 its very simple but again not the safest way.
  any suggestion or examples please ?
  it needs to be stored in db, and of course have the possibility to be retrieved and read.
  the simplest way is what im looking for</p>