Unset does not work

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I don’t want to save a record twice by giving F5 on the page.

I put a input type hidden on the form and I’m checking if it was started to perform a Insert, and whether the Insert I’m giving away unset in the variable $_POST identifying the form.

<form action="#" method="POST">

    <input type="hidden" name="formulario" value="1">

    <input type="text" name="nome" />

</form>

<?php

    $formulario = $_POST['formulario'];

    if ((isset($formulario)) && ($formulario == '1')) {

        $name = $_POST['nome'];

        if (mysqli_query($conn, "INSERT INTO user (`nome`) VALUES ('$name')")) {

            unset($formulario);

        }

    }

?>
php

  • Tereza, instead of giving unset, you can assign another value to her, for example, '2'.

  • @Rodrigotognin This will make no difference. When updating the page, a new request will be made with the same data and the same insertion will be done.

  • you can also give a header('Location: '.$_SERVER['PHP_SELF']); it will redirect to the same page and will not have the $_POST

1 answer

0

Tereza, you may have to create the file with php code on another page. Or, use Javascript with AJAX. (I’ve had a similar problem with this)

I will put the answer only with the use of PHP. And then I’ll leave the link to the answer to a question I asked (about a problem similar to this only using Javascript/jQuery.

Reply with PHP:

Here you would have to create another file (Let’s say it will be the send.php file).

<form action="enviar.php" method="POST">

  <input type="text" name="nome" />

</form>



<!-- Arquivo enviar.php -->


<?php
 

    if($_POST) 
    {

    $name = $_POST['nome'];


      $inserindo = "INSERT INTO nome_da_tabela(nome_do_campo) VALUES('$name');";
	
	$resultado_insert = mysqli_query($conn,  $inserindo);
         

     }
      
     header(location:"pagina-do-seu-form.html");
    

?>

  <!-- O HEADER vai redirecionar para página que contém seu form -->

Here is the link of the question (asked by me) with the answer, but using Javascript.

Link

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