Confirm delete javascript, php

Question

I am using a simple way to have confirmation box when deleting a record, problem here is I couldn't find where to place header code for redirecting to some other page after deletion. I have placed it after executing query and get this error

Cannot modify header information - headers already sent by (output started at ...

and I am not redirected to required page, but somehow on reloading page record wasn't there it was deleted.

if(isset($_POST['submit'])){
$que=$db->prepare("DELETE FROM blogs WHERE blogs_id = :blogId");
$que->execute(array(':blogId'=>$blogId));
header("location:front.php");
}

<form method="POST">
<input type="submit" name="submit" value="Delete" onclick="return confirm("Are you sure you want to delete this?")" />
</form>

Answer 1

replace

header("front.php");

with

echo "<script> window.location='front.php';</script>";

Answer 2

使用元刷新标签而不是标题来重定向页面

<meta http-equiv="refresh" content="0;url=http://example.com">

Answer 3

you need to use header("location:front.php"); instead of header("front.php"); //but before header there should not be any echo or print otherwise it will not redirect.

your input for confirmation is wrong change it to this:

<input type="submit" name="submit" value="Delete" onclick='return confirm("Are you sure you want to delete this?")' />