Replace and with &&

includes/metadata.inc

@@ -107,7 +107,7 @@ function islandora_metadata_display_form(array $form, array $form_state) {
       );
       $form['viewers']['configuration'][$name] = array(
         '#type' => 'item',
-        '#markup' => (isset($profile['configuration']) and $profile['configuration'] != '') ? l(t('configure'), $profile['configuration']) : '',
+        '#markup' => (isset($profile['configuration']) && $profile['configuration'] != '') ? l(t('configure'), $profile['configuration']) : '',
       );
     }
     $form['viewers']['default'] = array(

includes/solution_packs.inc

@@ -789,9 +789,9 @@ function theme_islandora_viewers_table($variables) {
  */
 function islandora_get_viewer($params = NULL, $variable_id = NULL, AbstractObject $fedora_object = NULL) {
   $settings = variable_get($variable_id, array());
-  if (!empty($settings) and $settings['default'] !== 'none') {
+  if (!empty($settings) && $settings['default'] !== 'none') {
     $viewer_id = islandora_get_viewer_id($variable_id);
-    if ($viewer_id and $params !== NULL) {
+    if ($viewer_id && $params !== NULL) {
       $callback = islandora_get_viewer_callback($viewer_id);
       if (function_exists($callback)) {
         return $callback($params, $fedora_object);