edit

cek_comment.php

@@ -12,8 +12,8 @@
 
 	$input = mysqli_query($koneksi, $query) or die(mysqli_error($GLOBALS["___mysqli_ston"]));
 	if($input){
-		
-		header('Location: form_comment.php');
+		echo("<script> alert('Username sudah terdaftar , silahkan ganti username anda')</script>");
+        echo "<meta http-equiv='refresh' content='1 url=form_comment.php'>";
 	}else{
 		echo'gagal memberikan komentar!';
 		header('Location: form_comment.php');