I'm working on a little project for myself to try and make a documentation page, Now everyone knows the basic echo 'hello world' inside of the PHP tags like so: yet i have this in an HTML document and was wondering. Is there a way to display PHP code inside of HTML code? or do i need to approach this

How to insert code as code inside a document

<pre>
      Een PHP script kan overal in een document geplaatst worden. <br>
      een PHP script begint met: <code> ***<?php ?>*** </code>
    </pre>

I’m working on a little project for myself to try and make a documentation page, Now everyone knows the basic echo ‘hello world’ inside of the PHP tags like so:

    <?php 
echo 'hello world'; 
?>

yet i have this in an HTML document and was wondering. Is there a way to display PHP code inside of HTML code? or do i need to approach this differently? When i try this inside of the or tags it won’t display the ‘<‘ from ?php. i have also read on MDN docs and it quotes:

“Use the element or, if semantically adequate, the element instead. Note that you will need to escape the ‘<‘ character as ‘<‘ to make sure it is not interpreted as markup.”

Any help and advice is truly appreciated.

Answer

You need htmlentities(). As per docs

Convert all applicable characters to HTML entities

So basically you need to do this

<?php
echo htmlentities('<?php echo "hello world"; ?>');
?>

Working example http://sandbox.onlinephpfunctions.com/code/c7629280bdb7368e17f41643fed43675dd95fe89

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Answer