title: PHP get ? without setting variable to anything
body: <p>If I were to call:</p>
  
  <p>www.*.com?hello</p>
  
  <pre><code>if($_GET["hello"]){
  }
  </code></pre>
  
  <p>It will always return false because ?hello variable needs to be set as something...</p>
  
  <p>Is there a way to get the ? part without setting the variable to anythign before hand?</p>