PHP into database with dynamic form with javascript (codeigniter)

Question

I want to insert multiple data (PHP CodeIgniter) using array. but I still find an error. The error is array is not clear

function insert(){

    $hitung=count($_POST['pembicara']);

    $pengisi=implode(',',$_POST['pembicara']);
    $materi=implode(',',$_POST['materi']);
    $alasan=implode(',',$_POST['alasan']);

    $datapembicara = array(
    'id_kegiatan'   => $x,
    'nama_pembicara'   => $pengisi,                                         
    'materi'      => $materi,                                           
    'alasan'      => $alasan,
    );

    $this->m_admin_smf->add_pembicara($datapembicara);
}

when I var_dump show the result like

array (size=4)
  'id_kegiatan' => int 990550
  'nama_pembicara' => string '1,2' (length=9)
  'materi' => string '1,2' (length=3)
  'alasan' => string '1,2' (length=3)

array (size=4)
  'id_kegiatan' => int 990550
  'nama_pembicara' => string '1,2' (length=9)
  'materi' => string '1,2' (length=3)
  'alasan' => string '1,2' (length=3)

the result is should be like

array (size=4)
  'id_kegiatan' => int 990550
  'nama_pembicara' => string '1' (length=9)
  'materi' => string '1' (length=3)
  'alasan' => string '1' (length=3)

array (size=4)
  'id_kegiatan' => int 990550
  'nama_pembicara' => string '2' (length=9)
  'materi' => string '2' (length=3)
  'alasan' => string '2' (length=3)

what should I do?

How if like this? but show an error

$hitung = count($_POST['pembicara']);
$datapembicara = array();
for($i = 0; $i < $hitung; $i++) {
    $datapembicara[] = array(
        'id_kegiatan' => $x,
        'nama_pembicara' => $_POST['pembicara'][$i],
        'materi' => $_POST['materi'][$i],
        'alasan' => $_POST['alasan'][$i],
    );
}

$this->m_admin_smf->add_pembicara($datapembicara);

Answer 1

If you want them on a series of batches, then you'll have to do something other than implode since the behavior will be different from the one you need. You can use a simple for loop to create such array structure into series of batches:

// Controller
function insert()
{

    $hitung = count($_POST['pembicara']);
    $datapembicara = array();
    for($i = 0; $i < $hitung; $i++) {
        $datapembicara[] = array(
            'id_kegiatan' => $x,
            'nama_pembicara' => $_POST['pembicara'][$i],
            'materi' => $_POST['materi'][$i],
            'alasan' => $_POST['alasan'][$i],
        );
    }

    var_dump($datapembicara);

    $this->m_admin_smf->add_pembicara($datapembicara);
}

Sidenote: I'd suggest use input class of codeigniter since it can handle XSS for you.

$value = $this->input->post('value', true); // add true parameter flag

Then after said array is made, you can use ->insert_batch() of active record. It'll do the multiple insertions for you, plus, your values are automatically escaped.

// Model
public function add_pembicara($data)
{
    $this->db->insert_batch($data);
}