title: PHP file will not update in browser
body: <p>For some odd reason, every time I update a file, it is not updating inside a browser (localhost - wampserver). To be more specific. If I have a simple php script:</p>
  
  <pre><code>echo "hello world";
  </code></pre>
  
  <p>It runs fine in the browser, and shows the text 'hello world'.</p>
  
  <p>However, if I update it to</p>
  
  <pre><code>echo "goodbye world";
  </code></pre>
  
  <p>And refresh the browser, nothing happens. The text remains 'hello world'.</p>
  
  <p>This has not been a problem before and was refreshing perfectly. I tried clearing the browser cache, tested on multiple browsers, restarted my wamp server, and restarted the computer. Nothing seems to be working.</p>
  
  <p>The only way the code seems to be updated is if I run the script from my IDE. Then it shows up in the browser with the updated code. How can this problem be fixed? I want it to go back to the way it was and be able to refresh from within the browser.</p>
  
  <p>Using wampserver php - 5.3.13, apache 2.2.22</p>