title: Which is a better way to check if an array has more than one element?
body: <p>I just need to check if an array has more than one element. 
  I am trying to do it this way :</p>
  
  <pre><code>if (isset($arr['1']))
  </code></pre>
  
  <p>the other traditional way is </p>
  
  <pre><code>if (sizeof($arr)&gt;1)
  </code></pre>
  
  <p>Which of the two is better? In such situaions, how should I judge between two alternate methods?
  Is there any performance check meter available to measure which is better?</p>