Why my php code turns to comment? : <p>im tried to write php to my html file, im using wampserver, but when i add php in html it's turns to comment why ? Pls help.</p>

<pre><code>&lt;?php 
echo "hello"

 ?&gt;
</code></pre>

<p><strong>turns to comment</strong></p>

<pre><code>&lt;--?php 
echo "hello"

 ?--&gt;
</code></pre>
