how to echo the array using foreach

Question

Well I have a variable $curva that I counted a array, if I’m a var_dump the result is this:

 array (size=6)
  0 => 
    array (size=4)
      'id' => string '107' (length=3)
      'nome' => string 'LAREIRA PEQ.' (length=12)
      'qtd' => float 43
      'total' => float 64500
  1 => 
    array (size=4)
      'id' => string '108' (length=3)
      'nome' => string 'CHORAQUERIA PEQ.' (length=16)
      'qtd' => float 60
      'total' => float 48000
  2 => 
    array (size=4)
      'id' => string '109' (length=3)
      'nome' => string 'JOGO DE FACAS' (length=13)
      'qtd' => float 90
      'total' => float 27000
  3 => 
    array (size=4)
      'id' => string '111' (length=3)
      'nome' => string 'PROVALEIRA' (length=10)
      'qtd' => float 100
      'total' => float 6000
  4 => 
    array (size=4)
      'id' => string '110' (length=3)
      'nome' => string 'COOLERS' (length=7)
      'qtd' => float 84
      'total' => float 21000
  5 => 
    array (size=4)
      'id' => string '112' (length=3)
      'nome' => string 'CHAMPANHEIRA' (length=12)
      'qtd' => float 28
      'total' => float 1962.64

I tried to do so:

foreach ($curva as $c) {
        ?>
        <tr>
            <td><?= $c->id ?></td>
            <td><?= $c->nome ?></td>
            <td><?= $c->qtd ?></td>
            <td><?= $c->total ?></td>
        </tr>
        <?php
    }

But it’s not working. Someone knows what it might be?

Answer 1

The -> is used by stdClass and normal class, not arrays, in array we use array[chave], should look like this:

<tr>
    <td><?= $c['id'] ?></td>
    <td><?= $c['nome'] ?></td>
    <td><?= $c['qtd'] ?></td>
    <td><?= $c['total'] ?></td>
</tr>

A tip for when mixing html and php, but it’s just my opinion, is to use the alternative syntax this way (but only when mixing HTML and PHP, of course it will matter of taste too):

<?php foreach ($curva as $c): ?>
    <tr>
        <td><?= $c['id'] ?></td>
        <td><?= $c['nome'] ?></td>
        <td><?= $c['qtd'] ?></td>
        <td><?= $c['total'] ?></td>
    </tr>
<?php endforeach; ?>

---

Extra

I noticed in your other code you did this:

while ($resultado = mysqli_fetch_object($consulta)) {
    $curva[] = array(
        "id" => $resultado->id,
        "nome" => $resultado->nome,
        "qtd" => $qtd,
        "total" => $total
    );
}

If you simplify it like this:

while ($resultado = mysqli_fetch_object($consulta)) {
    $curva[] = $resultado;
}

It will be possible to use this:

<?php foreach ($curva as $c): ?>
    <tr>
        <td><?= $c->id ?></td>
        <td><?= $c->nome ?></td>
        <td><?= $c->qtd ?></td>
        <td><?= $c->total ?></td>
    </tr>
<?php endforeach; ?>

And the ordination should stay so be by qtd:

uasort($teste, function ($a, $b) {
    return $a->qtd < $b->qtd;
});

If it’s for nome:

uasort($teste, function ($a, $b) {
    return strcmp($a->nome, $b->nome);
});

If you want to get the current index you can do so:

<?php foreach ($curva as $key => $c): ?>
    <tr>
        <td>Índice: <?= $key ?></td>
        <td><?= $c->id ?></td>
        <td><?= $c->nome ?></td>
        <td><?= $c->qtd ?></td>
        <td><?= $c->total ?></td>
    </tr>
<?php endforeach; ?>

If you want to use Indice to update you can think about trying to use reference using the & ("and "commercial):

Doc: http://php.net/manual/en/language.references.php

<?php foreach ($curva as &$c): ?>
    <?php
        $c->nome = 'João';
    ?>
    <tr>
        <td><?= $c->id ?></td>
        <td><?= $c->nome ?></td>
        <td><?= $c->qtd ?></td>
        <td><?= $c->total ?></td>
    </tr>
<?php endforeach; ?>

<?php

print_r($curva); //Veja que o valor foi atualizado

?>