PHP tag in post content makes wordpress go crazy

Question

I am trying to insert PHP code in post content, but I've just realized that it brokes Wordpress or maybe some plugin.

As for example

avoid any specific class naming structure or style.
<?php 

You can see this simple example at work in this CodePen demo. Resize the window to see the change take place.

So in this case You can see ... won't be rendered as output.

If php tag is closed like this

  avoid any specific class naming structure or style.
    <?php 
    // Some code 
    ?>

    You can see this simple example at work in this CodePen demo. Resize the window to see the change take place.

I this case everything work just fine...

I also tried to wrap using pre,cod and shortcodes, but still the same.

I am using the latest version of wordpress. Maybe someone has already faced with this problem.

Thanks.

Answer 1

If you only want the php code to be output without executing it, just escape the < signs by replacing it with the html entity <.

<?php

Like this, the tag will not be recognised and will be output as <?php.