title: Hint or partially hide email address with stars (*) in PHP
body: <p>I have this mail address
  <code>abcedf@example.com</code>.</p>
  <p>How to convert it into this mail address
  <code>a****f@example.com</code></p>
  <p>I tried using <code>strpos</code> and get <code>@</code> but I cannot get middle values and change it to <code>****</code>.</p>