It’s a path through ‘openghead()’ that doesn’t initialize $open_graphite_head.
/* Open Graph Ouput into <head> */
add_action('wp_head', 'openghead', $output_priority);
function openghead() {
/* Homepage */
if ( is_home() || is_front_page() ) {
$open_graphite_head = '
<!--/ Open Graphite Start /-->
<!--/ Open Graphite End /-->' . "\n\n";
/* Other pages, posts and custom post types */
} else {
if (isset($ogoptions['post_types']) && in_array(get_post_type(), $ogoptions['post_types']) || class_exists( 'WooCommerce' )) {
$open_graphite_head = '
<!--/ Open Graphite /-->
<!--/ Open Graphite End /-->' . "\n\n";
}
/***** This point allows $open_graphite_head to be unset if:
is_home() == false
is_front_page() == false
class_exists( 'WooCommerce' ) == false
isset($ogoptions['post_types']) == false --OR-- in_array(get_post_type(), $ogoptions['post_types']) == false
*****/
}
echo $open_graphite_head;
}
