Trouble with continous refreshing page

Question

When I try to run this script:

<form class="form-inline" action="<?php $_SERVER['PHP_SELF']; ?>" method="POST">
    <button type="submit" name="buttonSubmit" class="btn btn-default">Submit</button>
</form>
<?php
  if (isset($_POST['buttonSubmit'])) {
    unset($_POST['buttonSubmit']);
    echo "<script>alert(".isset($_POST['buttonSubmit']).")</script>";
    echo "<script>location.reload(true);</script>";
  }
?>

As a result, the page is refreshing in an infinite loop.

What is the reason?

How do I refresh my website only once?

it's duplicate of this https://stackoverflow.com/questions/3715047/how-to-reload-a-page-using-javascript — Gufran Hasan, Apr 15 '18 at 08:22
Change `location.reload(true);` to `window.location.href = '';` — Karlo Kokkak, Apr 15 '18 at 08:22
i updated my answer with yet another solution, which might be even better. That one I use all the time, making sure users doesn't submit repeatedly — Asons, Apr 15 '18 at 08:47
This looks like you are attempting to prevent a page from being cached; it's a horrible hack and the wrong approach. Just use appropriate HTTP cache-control headers. — Quentin, Apr 15 '18 at 08:58

Asons · Answer 1 · 2018-04-15T09:14:38.993

When you use location.reload(true);, you do the same, programmatically, as clicking on the browsers "Refresh/Reload" button.

This will generate yet another "submit", over and over, hence always make the statement isset($_POST['buttonSubmit']) be true.

Here are a couple solutions:

location.href = 'page-to-load';
location.assign('page-to-load');
location.replace('page-to-load');

^{The Location.replace() method replaces the current resource, and after that the current page will not be saved in
session History, meaning the user won't be able to use the back button either,
to navigate to it and cause a repeated "submit", which normally will occur.}

Note, if the 'page-to-load' is the same being already loaded, you can use location.href, e.g.

location.replace(location.href);

Yet another way would be, instead of rely on a client side script, to do a response redirect upon a form submittion, server side.

How to make a redirect in PHP?

score 1 · Accepted Answer · edited Apr 15 '18 at 12:58

1

This helped me:

Change location.reload(true); to window.location.href = '';

edited Apr 15 '18 at 12:58

Funk Forty Niner

74,450
15
68
141

answered Apr 15 '18 at 08:36

Lukasz Re

79
1
11

Trouble with continous refreshing page

2 Answers2