CODEWITHSUNDEEP
phphtmlhttp-post
luca
luca

Reputation: 37156

Post data and refresh page

I have an edit-form page to edit my website posts. It uses post method to the same page. If the form is compiled correctly shows up a congrats message.

The problem:

When users hit the refresh button the script tries to repost the data again to page. Is there a way to avoid this?

thanks

Luca

Upvotes: 3

Views: 14107

Answers (4)

webfan
webfan

Reputation: 11

You should use the PRG pattern already mentioned above! Just for completeness I add the possibility of using javascript history.replaceState if your forms depend on js (e.g. noscript should invalidate the form or something similar...). 

<script>
  window.history.replaceState({}, '#no-reload');
</script>

Upvotes: 1

Filipe
Filipe

Reputation: 281

This is called the Post/Redirect/Get pattern. You do this by responding to a POST request with a 302/303 Redirect, which prevents that troublesome behavior on the client.

You can read more about this in the link I posted above.

Upvotes: 0

mvds
mvds

Reputation: 47134

The general outline of the PRG pattern is this:

if ( $_SERVER['REQUEST_METHOD'] == 'POST' )
{
     /// do your magic

     $_SESSION['error'] = "Thanks for your message!";

     // this should be the full URL per spec, but "/yourscript.php" will work
     $myurl = ...;

     header("Location: $myurl");
     header("HTTP/1.1 303 See Other");
     die("redirecting");
}

if ( isset($_SESSION['error']) )
{
     print "The result of your submission: ".$_SESSION['error'];
     unset($_SESSION['error']);
}

Upvotes: 9

Jon
Jon

Reputation: 437854

You need to use the PRG pattern.

Upvotes: 1

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