Getting php variable

Hi,

I’m trying to get php variable into my editor content.
I tried to create put in the editor test and in the page where i get the the_content() to put instead:

<?php
$mylink=’www.example.com’;
str_replace( ‘%%mylink%%’,$mylink,the_content());
?>

how should i do it right?

https://wordpress.org/plugins/tinymce-advanced/