保存json post值以发送到php中的另一个函数

Question

I have a form that when submit it send to 2 places one is php function and other to json, the reason is there is tag fields that i have to get there values is by json.

The problem is that the json array values going to different table in mysql and needs the id from the other php function. and always gave me Undefined index: elements

Code HTML:

here the form go to function cadastro_fornecedor()

<form id='form_c_fornecedor' action="<?php echo base_url().'admin/cadastro_fornecedor';?>" method="post" enctype="multipart/form-data">
   <button type="submit" class="btn btn-primary">adicionar</button>
</form>

Code JS:

here the form when submit colect the values im elements var and post them to get_value_fornecedor() and its working fine until here.

$('#form_c_fornecedor').bind('submit', function (d) {
    var elements = $('#try').tagHandler('getTags'); 
    $.post("<?php echo base_url().'admin/get_value_fornecedor/'; ?>",{elements: JSON.stringify(elements)});
});

Function get_value_fornecedor:

the function received the value with success.

public function get_value_fornecedor(){
    $elements = json_decode($_POST['elements'], true);
    return $elements;
}

Function cadastro_fornecedor:

Here that I receiving the error that Undefined index: elements thats mean the $elements value did not pass to this function.

public function cadastro_fornecedor(){
    $elements = $this->get_value_fornecedor();

    $inputall= $this->input->post();
    $this->form_validation->set_rules('nome_fantasia', 'Nome Fantasia', 'required');
    if ($this->form_validation->run() == FALSE){
      $this->session->set_flashdata('error', 'O campo Nome é obrigatório.');
    }else{
        if($_POST){
            $data_cad = date('Y-m-d');
            $data=array('desc_entidade' =>$inputall['desc_entidade'],
                        'data_cad'      =>$data_cad
                    );
            $id= $this->cake->c_fornecedor($data);

            if(!empty($elements)){
                for ($i = 0; $i < count($elements); $i++){
                    $data_produtos=array(   'fornecedor_id'    =>$id,
                                            'produto_tag'      =>$elements[$i]
                                    );
                    $this->cake->c_produto($data_produtos);
                }
            }
            $this->session->set_flashdata('success', 'O campo Nome é obrigatório.');
            //redirect(base_url().'admin/c_fornecedor');
        }
    }
}

Answer 1

Problem is you are posting data to method get_value_fornecedor but you are not saving it anywhere, make use of codeigniter session

First you have load session library.

$this->load->library("session");

You can load it in auto load, which I think is better.

To set session

$this->session->set_userdata("SESSION_NAME","VALUE");

To extract Data

$this->session->userdata("SESSION_NAME");

You can rewrite your function like below

public function get_value_fornecedor()
{
    /* This is for your ajax call for saving data inside session where key somedata*/
    if(isset($_POST['elements']))
    {
            $this->session->set_userdata("somedata",$_POST['elements']);
    }else
    {
           /* This is for accessing your saved data */
            $elements_saved = $this->session->userdata("somedata");

            if($elements_saved)
            {
                  $elements = json_decode($elements_saved, true);
                  return $elements; 
            }
    }
}