Fix trailing whitespace and JSON parse errors on backend

04/ambil_data.php

@@ -5,9 +5,12 @@ $data = [];
 
 $result = $conn->query("SELECT * FROM spbu");
 
-while ($row = $result->fetch_assoc()) {
-    $data[] = $row;
+if ($result) {
+    while ($row = $result->fetch_assoc()) {
+        $data[] = $row;
+    }
+} else {
+    // If table doesn't exist or other error, return empty array
 }
 
-echo json_encode($data);
-?>
+echo json_encode($data);