title: PHP pass variable after form is submitted
body: <p>I have a form that posts to process.php. Process.php send all the data to mysql then returns back to the page using:</p>
  
  <pre><code>&lt;?php header("Location: /campaigns"); ?&gt;
  </code></pre>
  
  <p>On the page it returns to I want to display a message saying form submitted. Can I post a variable to the Location: /campaigns. And use the variable to display the message (or modal box)? and if so what would be the best way to do it?</p>