title: Why variable can not start with a Number?
body: <p>I am working in PHP, I have to define variables in sequence to save in Mysql. Both field name and variable name must be same in my case.</p>
  
  <p>Can I declare a variable like this</p>
  
  <pre><code>$1 OR $2 etc 
  </code></pre>
  
  <p>If not why not and if yes why yes?</p>
  
  <p>I tried:</p>
  
  <pre><code>$id = 0;
  $6  = $_REQUEST['6'];
  $7  = $_REQUEST['7'];
  $8  = $_REQUEST['8'];
  
  $xary = array('6','7','8','9')
  
  $oAppl-&gt;save_record("tablename", $id, "id");
  </code></pre>
  
  <p>which give me error.</p>
  
  <p>Also can I create and use fields in Mysql with the same name?</p>