error catch form post

[gish]

hi everyone

 

I have setup up my web page so that after a form button is clicked 20 times the page automatically freshes itself. That works fine but that the creates and issue because I have pressed the submit button it posts the data then refreshed itself. but because it it refreshes anything that was posted it will ask if you want to post it again.

 

What I want to know is there anyway to error catch it so that I dodge it or clear the post variable.

 

gishaust

[halles]

Try This one..

<?php

function prevent_multi_submit($type = "post", $excl = "validator") {

    $string = "";

    foreach ($_POST as $key => $val) {

        // this test is new in version 1.01 to exclude a single variable

        if ($key != $excl) {

            $string .= $val;

        }

    }

    if (isset($_SESSION['last'])) {

        if ($_SESSION['last'] === md5($string)) {

            return false;

        } else {

            $_SESSION['last'] = md5($string);

            return true;

        }

    } else {

        $_SESSION['last'] = md5($string);

        return true;

    }

}

/* example of use:

if (isset($_POST)) {

    if ($_POST['field'] != "" && strlen < 25) { // place here the form validation and other controls

        if (prevent_multi_submit()) { // use the function before you call the database

            mysql_query("INSERT INTO tabel..."); // or send a mail like...

            mail($mailto, $sub, $body);

        } else {

            echo "The form is already processed";

        }

    } else {

        // your error about invalid fiels

    }

} */

?>