fixing bug

sys0-code/test/overview.php

@@ -94,6 +94,23 @@
 
                                         }
 
+
+	if(isset($_GET["set_class"]) && isset($_POST["class"])){
+		$class_id=htmlspecialchars($_POST["class"]);
+		$sql="update users set class_id=$class_id where username='$username'";
+		$stmt = mysqli_prepare($link, $sql);
+		mysqli_stmt_execute($stmt);
+		$stmt->close();
+		$sql="select name from class where id=$class_id";
+		$stmt = mysqli_prepare($link, $sql);
+		mysqli_stmt_execute($stmt);
+		$class_name="";
+		mysqli_stmt_bind_result($stmt, $class_name);
+		$stmt->close();
+		$_SESSION["class"]=$class_name;
+		$_SESSION["class_id"]=$class_id;
+	}
+
 ?>
 
 <script src="/assets/js/load_page.js"></script>
@@ -138,7 +155,6 @@
 	<div id="printer-container"></div>
 
 
-
 	<!-- Modals -->
 
 	<!-- cancel modal -->