title: PHP round half up doesn't work
body: <p>I have this code</p>
  
  <pre><code>&lt;?php echo round(0.572,2,PHP_ROUND_HALF_UP);?&gt;
  </code></pre>
  
  <p>I want to round two decimals to half up, I expect a value as 0.58...
  but the above code print 0.57</p>
  
  <p>How can I do  this?</p>