title: What is the "correct" way to start and close a PHP statement?
body: <p>Is there any difference or associated risk opening with the following PHP variations?</p>
  
  <pre><code>&lt;? echo "hello world!"; ?&gt;
  
  &lt;?php echo "hello world!"; ?&gt;
  
  &lt;?="hello world!"?&gt;
  </code></pre>
  
  <p>Also, is it necessary to close all scripts with <code>?&gt;</code></p>