Ok, here is how the thumbnail url should be called:
<header <?php if ( has_post_thumbnail($currentpageid) ) { ?> style="background-image: url(<?php echo $page_thumb['0'];?>)"<?php }?>></header>
Ok, here is how the thumbnail url should be called:
<header <?php if ( has_post_thumbnail($currentpageid) ) { ?> style="background-image: url(<?php echo $page_thumb['0'];?>)"<?php }?>></header>