title: Javascript's .toString(16) in PHP
body: <p>I'd like to do the same as JavaScript's <code>.toString(16)</code> but in PHP :</p>
  
  <pre><code>var n = 200000002713419;
  console.log(n.toString(16));
  </code></pre>
  
  <p>This returns <code>b5e6211de74b</code>.
  How can I achieve the same with PHP ?</p>
  
  <p>Thanks a lot.</p>