university alert issue

Apollo/api/application/controllers/University_Controller.php

@@ -148,10 +148,18 @@ class University_Controller extends REST_Controller {
     public function insertUniversity_post() {
         
      // echo "sdg";
+
+        $imagename='';
+        $size='';
+        $imageSource='';
+       
         
+        if(!empty($_FILES))
+         { 
       $imagename = $_FILES['idProof']['name'];
       $size = $_FILES['idProof']['size'];
       $imageSource = $_FILES['idProof']['tmp_name'];
+       }
       // echo $imagename;
       // echo $size;
       // echo $imageSource;