title: PHP echo variable and html together
body: <p>I know this is a basic php question, but I'm having trouble showing variables inside an echo of HTML. Below is what I'm trying to achieve.</p>
  
  <pre><code>&lt;?php
      $variable = 'testing';
      echo &lt;span class="label-[variable]"&gt;[variable]&lt;/span&gt;
  ?&gt;
  </code></pre>
  
  <p>should output:</p>
  
  <pre><code>&lt;span class="label-testing"&gt;testing&lt;/span&gt;
  </code></pre>