title: Generate a unique PIN code based on the phone number
body: <p>With a unique phone number like <code>0241194000</code>, I want to generate a PIN code based on the phone number and also a way to check or validate that the PIN was really generated from the phone number.</p>
  
  <p>EXAMPLE</p>
  
  <pre><code>Number  : 0241194000                      LENGHT(10)
  PIN     : 675436                          LENGHT(6)     ONLY NUMERIC
  Checker : 673AA3738SHZXCVDER              ANY LENGTH    ALPHANUMERIC.
  </code></pre>
  
  <p>Any links or help will be great.</p>