title: Generate compatible Hash for Swift and PHP
body: <p>I want to create a password hash from PHP and Swift which should be compatible.
  What can be used to achieve that goal? I don't want to send the password in plaintext.</p>
  
  <p>Some Background information:
  I want a login with a hashed password in the database. This login shall be used from PHP and via REST API from Swift. I could use MD5 but MD5 isn't really secure.
  For password_verify (php) I need also the plaintext password, to verify it.</p>