How to output html format in original version in php

How to ensure that the original format of HTML is maintained when rendering the content of the HTML page in the PHP program.
For example, I have the following html format tag content

<code><div class="content-show">
    <p class="description">$val['desc'];<p>
    <div class="con"><span>$val['note']</span> | <span>$val['category']</span></div>
</div></code>

Reply content:

How to ensure that the original format of HTML is maintained when rendering the content of the HTML page in the PHP program.
For example, I have the following html format tag content

<code><div class="content-show">
    <p class="description">$val['desc'];<p>
    <div class="con"><span>$val['note']</span> | <span>$val['category']</span></div>
</div></code>

I don’t know if you are talking about the fixed-term talisman! Output the final character as it is. Reference is as follows

<code>$html = <<<END
    <div class="content-show">
        <p class="description">$val['desc'];<p>
        <div class="con"><span>$val['note']</span> | <span>$val['category']</span></div>
    </div>
END;</code>