Undefined index btn php

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Undefined index btn php

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#1 by (1 votes)

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I'm doing a page with a main view, which has the search button, load user and show user list.

All finally end up calling the controller that has functions according to value of the buttons. They work perfect for me, except for the user list, which tells me:

undefined index btn

in all the lines where this btn in the main controller (not only in the list of users), when in the rest of the btn does not tell me that!

Home

<h1>Sistema de Gestion de Multas</h1>
    <a href="altapersonas.html"><button class="btn btn-default" type="submit" name="btn" value="cargar">Cargar usuario</button></a> //Esto me lleva a la pagina de alta personas, la cual llama a la controladora desde el action del formulario 
<form method="post" action="../controladoras/controladoraprincipal.php">
//formulario
<button type="submit" class="btn btn-info" name="btn" value="agregar">Agregar</button>

When it arrives at the controller, it knows what to do by

if ($_POST["btn"] == "agregar")
{
    if (empty($_POST['nombre']) || empty($_POST['apellido'])  || empty($_POST['dni']) || empty($_POST['direccion']) || empty($_POST['fechanacimiento']))
        throw new Exception('Debe pasar todos los valores');
    $nombre = $_POST['nombre'];
    $apellido = $_POST['apellido'];
    $dni = $_POST['dni'];
    $direccion = $_POST['direccion'];
    $fechanacimiento = $_POST['fechanacimiento'];
    $persona1 = new Persona ($nombre, $apellido, $dni, $direccion, $fechanacimiento);
    $daop->agregar($persona1);
    $listado = $daop->todas();

    require_once ('../vistas/listadeusuarios.php');
}

And that's how it works perfect. Now, when I direct direct from the main view to the controller with the "User list" button:

<a href="../controladoras/controladoraprincipal.php">
<button class="btn btn-default" type="submit" name="btn" value="lista">Listado de usuarios
</button></a>

main controller

$daop= new PersonaJsonDao();

if ($_POST["btn"] == "lista")
{
    $listado = $daop->todas();
    require_once('../vistas/listadeusuarios.php');
}

The result is

Notice: Undefined index: btn in C: \ wamp \ www \ projectmultiples \ controllers \ mastertrader.php on line 13 Call Stack Time Memory Function Location 1 0.0019 149288 {main} () .. \ controlerprincipal.php: 0

And it marks me that this error is in all the lines where this btn . However, in the rest of the lines where this percentage is%, when I use it, that error does not mark me.

php

asked by merisavino 30.10.2016 в 03:04

source

1 answer

invalid pointer free () Join video (with sound) and external audio

score 1 · Accepted Answer

You can not send, as you have it, by a <a> and by POST the value of <button> .

The <button> should go in a <form> :

<form method="post" action="../controladoras/controladoraprincipal.php"> 

   <!-- formulario -->

    <button class="btn btn-default" type="submit" name="btn" value="lista">Listado de usuarios</button>
</form>

and in controladoraprincipal.php :

if (isset('btn') && $_POST['btn'] == 'lista') {

     // resto de código
}