title: What is the name of the technique to allow changing URL formats in PHP?
body: <p>I'm building a webservice that get's a hash, currently:</p>
  
  <pre><code>http://example.com/?hash=123abc
  </code></pre>
  
  <p>I want to change it to this format:</p>
  
  <pre><code>http://example.com/123abc
  </code></pre>
  
  <p>What is the name of this technique?</p>
  
  <p>Thanks!</p>