fixed

Closes #3405247

src/Plugin/CustomFormatters/FormatterType/PHP.php

@@ -37,17 +37,20 @@ class PHP extends FormatterTypeBase {
    */
   public function viewElements(FieldItemListInterface $items, $langcode) {
     ob_start();
-    $output = eval($this->entity->get('data'));
+    
+    $data = $this->entity->get('data');
+
+    if (is_array($data) && isset($data[0])) {
+        $output = eval($data[0]);
+    } else {
+        $output = eval($data);
+    }
+
     $output = !empty($output) ? $output : ob_get_contents();
     ob_end_clean();
 
-    // Preview debugging; Show the available variables data.
-    // @todo Re-add when preview functionality re-added.
-    //if (\Drupal::moduleHandler()->moduleExists('devel') && isset($formatter->preview) && $formatter->preview['options']['dpm']['vars']) {
-    //  dpm($variables);
-    //}
-
     return empty($output) ? FALSE : $output;
-  }
+}
+
 
 }