WordPress: Multiple conditional statements not working

Question

I'm trying a simple multiple conditional statement which should work fine with PHP but WordPress says no. What am I missing?

<?php if (is_page('sample1') || is_page('sample2') || is_page('sample3') ||     is_page('sample4')) { ?>
include this
<?php } else { ?>
include this instead
<?php } ?>

Answer 1

Undefined function?

How are you calling footer.php from your theme?

Answer 2

It has nothing to do with the code you posted. It has everything to do with the path to the footer or where you are trying to load it within the page lifecycle. Also check if the path is right.