title: Best method for sum two arrays
body: <p>I have two arrays:</p>
  
  <pre><code>$a = array(10, 2, 5, 10, 0);
  $b = array(1, 20, 11, 8, 3);
  </code></pre>
  
  <p>I need to sum up and get the result:</p>
  
  <pre><code>$c = array(11, 22, 16, 18, 3);
  </code></pre>
  
  <p>Any suggestions on how do this without "foreach"?</p>