Set_value() Array fields select option Codeigniter not working - php

Question

I trying to create dynamic server side select input, after i submit, the set_value('nilai[]') not showing any value.
Here's my Controller below:
$this->load->library('form_validation');
$this->form_validation->set_rules('nilai[]', 'Nilai Pantuhir', 'required');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('pantuhir/pantuhir_form');
} else {
$list_pantuhir = $this->input->post('nilai');
foreach ($list_pantuhir as $key => $value) {
echo $value."<br />";
}
}
Here's my view below :
<div class="form-group <?php if(form_error('nilai[]')){echo 'has-error';} ?>">
<select class="form-control" name="nilai[]">
<option value="">- Choose-</option>
<option value="<?php echo $rowPerson['intUserId'].'-'.'A';?>" <?php if(set_value('nilai[]') == $rowPerson['intUserId'].'-'.'A') { echo 'selected'; } ?>>A</option>
<option value="<?php echo $rowPerson['intUserId'].'-'.'B';?>" <?php if(set_value('nilai[]') == $rowPerson['intUserId'].'-'.'B') { echo 'selected'; } ?>>B</option>
</select>
<?php echo form_error('nilai[]'); ?>
</div>
I want to show set_value and get selected in option field if validation not correct.

Answer 1

Hope this will help you :
Use set_select instead of set_value. If you use a menu, this function permits you to display the menu item that was selected, after the form validation throws any error
It should be like this :
<div class="form-group <?php if(form_error('nilai[]')){echo 'has-error';} ?>">
<select name="nilai[]" >
<option value="" >---Choose----</option>
<option
value="<?=$rowPerson['intUserId'].'-A';?>"
<?=set_select('nilai[]', $rowPerson['intUserId'].'-A');?>
>A</option>
<option
value="<?php echo $rowPerson['intUserId'].'-B';?>"
<?=set_select('nilai[]', $rowPerson['intUserId'].'-B');?>
>B</option>
</select>
<?php echo form_error('nilai[]'); ?>
</div>
For more : https://www.codeigniter.com/user_guide/helpers/form_helper.html#set_select

Answer 2

Use this code in the view
<div class="form-group <?php if(form_error('nilai[]')){echo 'has-error';} ?>">
<select class="form-control" name="nilai[]">
<option value="">- Choose-</option>
<option value="<?php echo $rowPerson['intUserId'].'-'.'A';?>" <?php if(set_value('nilai[]',rowPerson['intUserId'].'-'.'A') == $rowPerson['intUserId'].'-'.'A') { echo 'selected'; } ?>>A</option>
<option value="<?php echo $rowPerson['intUserId'].'-'.'B';?>" <?php if(set_value('nilai[]',$rowPerson['intUserId'].'-'.'B') == $rowPerson['intUserId'].'-'.'B') { echo 'selected'; } ?>>B</option>
</select>
<?php echo form_error('nilai[]'); ?>
</div>