title: Is it okay to name a cookie starting with a number?
body: <p>I want to know if is it okay to name a cookie starting with a number. Actually, I've tested the following code using Apache2.2.21, PHP 5.3.8 and Chrome 19.0.1084.46:</p>
  
  <pre><code>setcookie('1test', 'a value'); 
  if (isset($_COOKIE['1test'])) echo $_COOKIE['1test'];
  </code></pre>
  
  <p>It works just fine under these conditions, but what I want to know: <strong>is there any spec or RFC that recommends not to do it?</strong></p>