title: Get first letters from a string of two words (PHP - fastest way)
body: <p>If I have a set of two words (separated by space), for example:</p>
  
  <pre><code>$str='nice couple';
  </code></pre>
  
  <p>What is the fastest (for server processing) method of getting the FIRST letters from each word? Ie. the final result should be:</p>
  
  <blockquote>
    <p>nc</p>
  </blockquote>
  
  <p>I know I could take $str[0] and it would be the fastest to get the first character ('n), but how to get the second ('c') in such a fast way too so that I get in final 'nc'?</p>