title: How can I check if multiple array keys exist?
body: <p>Is there a simpler, smarter and clearer way to write this?</p>
  <pre><code>if (array_key_exists(&quot;name&quot;, $array) AND array_key_exists(&quot;age&quot;, $array) AND array_key_exists(&quot;size&quot;, $array) AND array_key_exists(&quot;gender&quot;, $array) {
      echo &quot;Keys exist!&quot;;
  }
  </code></pre>