refisi update

save_score.php

@@ -0,0 +1,24 @@
+<?php
+session_start();
+$conn = new mysqli("localhost", "root", "", "dodge_game");
+
+if ($conn->connect_error) {
+    die("DB Error: " . $conn->connect_error);
+}
+
+$username = $_POST['username'];
+$score = intval($_POST['score']);
+
+// cek jika user sudah punya skor sebelumnya
+$check = $conn->query("SELECT * FROM leaderboard WHERE username='$username'");
+
+if ($check->num_rows > 0) {
+    // update jika score baru lebih tinggi
+    $conn->query("UPDATE leaderboard SET score=GREATEST(score, $score) WHERE username='$username'");
+} else {
+    // insert jika belum ada
+    $conn->query("INSERT INTO leaderboard (username, score) VALUES ('$username', $score)");
+}
+
+echo "OK";
+?>