Adding isset validation

main/inc/lib/plugin.lib.php

@@ -249,6 +249,7 @@ class AppPlugin {
      */
     function get_plugin_info($plugin_name, $forced = false) {
         static $plugin_data = array();
+        
         if (isset($plugin_data[$plugin_name]) && $forced == false) {
             return $plugin_data[$plugin_name];
         } else {
@@ -395,11 +396,15 @@ class AppPlugin {
             }
             if ($i>0) {
                 $plugin_info = $this->get_plugin_info($plugin_name);
+                
+                if (isset($plugin_info['plugin_class'])) {
                     $obj = $plugin_info['plugin_class']::create();
                     $obj->course_settings_updated($subvalues);
                 }
             }
         }
+    }
+    
     /**
      * Gets a nice array of keys for just the plugin's course settings
      * @param string The plugin ID
@@ -409,6 +414,8 @@ class AppPlugin {
         $settings = array();
         if (empty($plugin_name)) { return $settings; }
         $plugin_info = $this->get_plugin_info($plugin_name);
+        
+        if (isset($plugin_info['plugin_class'])) {
             $obj = $plugin_info['plugin_class']::create();
             if (is_array($obj->course_settings)) {
                 foreach ($obj->course_settings as $item) {
@@ -422,6 +429,7 @@ class AppPlugin {
                 }
             }
             unset($obj); unset($plugin_info);
+        }
         return $settings;
     }
 }