ckeditor mode open php tag

Question

PHP

<?php replaces with <!--?php googled for a long time, but did not find a solution

Answer 1

Renders
[php]
echo 'By test';
?>
[/php]
And source code
[php]
<!--?php
echo 'By test';
?>
[/php]

Answer 2

Well, what's the problem, just replace it <!--?phpwith <?phpwhere you will use it.

Answer 3

read the documentation
docs.cksource.com/Main_Page
most likely you are not the first to encounter this problem

Answer 4

try to just replace the tags on the output, before writing (to the database, for example)

$text = $_REQUEST['text'];
$text = preg_replace("<!--?php", "<?php", preg_replace("?-->", "?>", $text));