Hi matthisco, it looks like you're using php's if statement with a :
When we "clean up your code" or just look at it from a different point of view, we see:
<?php
if (
is_page( 157 ) ||
(
is_page() && $post->post_parent
)
:
?>
It looks like you're missing a closing ) on your if statement. If we add that closing ) in there, we get:
<?php
if (
is_page( 157 ) ||
(
is_page() && $post->post_parent
)
)
:
?>
... or ...
<?php if ( is_page( 157 ) || ( is_page() && $post->post_parent) ):?>
Keep us updated and let us know if that helps or not!