Description:
------------
I try this code

it seem that ?> works in // line
why ?

after this.
I try the same code but using /*  */ instead //
it works find and get the right result.

Reproduce code:
---------------
<xmp><?php

$str = 'gogo<hr>cc<br>test';
// $str = '/(.*?)(<\/?.*?>


echo $str;
?>

Expected result:
----------------
gogo<hr>cc<br>test


Actual result:
--------------
echo $str;
?>