Post data and refresh page

问题

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

回答1:

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']);
}

回答2:

You need to use the PRG pattern.

回答3:

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.

回答4:

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>

来源：https://stackoverflow.com/questions/5427428/post-data-and-refresh-page

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php

html

http-post