PHP how to reset POST

✔ Recommended Answer

In order to prevent a form from being re-submitted, you could do something like this - it should be pretty self explanatory:

function uniquePost($posted) {    // take some form values    $description = $posted['t_betreff'].$posted['t_bereich'].$posted['t_nachricht'];     // check if session hash matches current form hash    if (isset($_SESSION['form_hash']) && $_SESSION['form_hash'] == md5($description) ) {       // form was re-submitted return false       return false;    }    // set the session value to prevent re-submit    $_SESSION['form_hash'] = md5($description);    return true;}if (isset($_POST["t_submit"]) && uniquePost($_POST)) {    $ticket_query   =   $db->prepare("INSERT INTO `ticket` (`Absender`, `Betreff`, `Abteilung`, `Prioritat`, `Erstellt`, `Nachricht`) VALUES (:sender, :betreff, :abteilung, :priority, :datum, :nachricht)");    $ticket_query->execute(array(    'sender'    =>  $_SESSION["id"],    'betreff'   =>  $t_betreff,    'abteilung' =>  $t_bereich,    'priority'  =>  $t_priority,    'datum'     =>  date('d.m.Y'),    'nachricht' =>  $t_nachricht                                            ));    // no need to reset the post variables}


Answered By: Reto

Method #2

In PHP, you cannot "reset" the $_POST array as it is a superglobal array that is automatically populated by PHP with the data submitted in a POST request. However, you can unset or clear individual elements of the $_POST array.

To unset a specific element of the $_POST array, you can use the unset() function. For example, to unset the value of the "username" input field, you can use the following code:


To clear the entire $_POST array, you can use the unset() function in a loop to unset each element of the array. For example, you can use the following code:

foreach ($_POST as $key => $value) { unset($_POST[$key]); }

Alternatively, you can assign an empty array to the $_POST variable to clear it completely. For example:

$_POST = array();

Note that this approach will only clear the $_POST array for the current script execution and will not affect any other scripts or subsequent requests.


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