dompdf form submit didn't send data codeigniter - php

Question

i am trying to create an PDF using Dompdf, in my program i have model query with a dynamic parameter based on the input in the form, but when i click on my button to send the value from the select button to the controller, the data not been send properly, any idea why? below are my code
<form class="form" method="get" action="<?=site_url()?>/laporan/pdfdownload" id="myID" name="myName">
<select id="sel1" class="form-control">
<option disabled selected="selected">Pilih</option>
<?php foreach ($kerja as $rows){?>
<option value="<?php echo $rows->id_project?>"><?php echo $rows->id_project.' - '.$rows->nama_project ?></option>
<?php }?>
</select>
<select id="sel2" class="form-control">
<option disabled selected="selected">Pilih</option>
<?php foreach ($item as $rows){?>
<option value="<?php echo $rows->id_project?>"><?php echo $rows->id_project.' - '.$rows->nama_project ?></option>
<?php }?>
</select>
<button id="filter_button" style="margin-top: 26px;margin-left: 28px;width: auto" name="filter_button" type="submit" class="form btn btn-danger"><i class="fa fa-search"></i>&nbspSearch</button>
</form>
and here is my controller
public function pdfdownload(){
//If i click submit then all of the post didnt get sended
$one = $this->input->post('sel1');//no value at all, anyone know why?
$two = $this->input->post('sel2');//no value at all, anyone know why?
$data['real'] = $this->report_m($one,$two)->row();
htmlcontent = $this->load->view('laporan/download/laporan3.php',$data,true);
include(APPPATH."third_party/dompdf/autoload.inc.php");
// require_once APPPATH . 'third_party/dompdf/autoload.inc.php';
$dompdf = new Dompdf\Dompdf();
$dompdf->load_html($htmlcontent);
$dompdf->set_paper("f4");
$dompdf->render();
$dompdf->stream("cobadlu.pdf",array("Attachment" => false));
exit(0);
}
enter code here

Answer 1

In your HTML form, you need to use name attribute, and not only ID :
<select id="sel2" name="sel2" class="form-control">

Answer 2

First of all there is a mistake in your form:
<form class="form" method="get" action="<?=site_url()?>/laporan/pdfdownload" id="myID" name="myName">
You given the method='get' here, please change it to 'post'.
Second you are not include the 'name' attribute to the input type so after submit no data will send. So add the name attribute like that:
<select id="sel1" name="sel1" class="form-control">
<select id="sel2" name="sel2" class="form-control">