Submit form and then after the form is processed open a new page

Question

I'am trying to delete an entry/offer from the database and then get back to all the entries/offer overview page. I tried to do it with Javascript but unfortunately it does not open the overview page. It does the deleting but then stays on the page.

Is that the correct way anyways with javascript?

Here the two links Overview and delete Offer

<a id="overview" href="/mbm-kalkulation">Overview</a>
<form method="post" action="/?id='.$_REQUEST["id"].'" name="delOffer"><button type="submit">delete Offer</button>

Here the javascript which should click the overview page after the form got submitted.

((isset($_REQUEST["delOffer"]))?'
            setTimeout(function(){
                jQuery("a#overview").click();
            }, 1000);
        ':'')

Answer 1

Normally such redirects are done using the header function from php. This is only possible, when the headers weren't already send. In this case you will have to use a JavaScript fallback. The code could look something like this:

if (isset($_REQUEST["delOffer"])) {
  if (!headers_sent()) {
    header("Content-Type: text/plain");
    header("Location: {$url}");
  } else {
    print "<script>window.location = '" . addslashes($url) . "';</script>";
  }

  exit;
}