how to validate array value in codeigniter - codeigniter

Question

I have in my form work experience which is added dynamically with input as organisation name, department name, position and duration.
<tr>
<td><span class="serial_no">1</span></td>
<td><input type="text" name="organization[]" size="50"/></td>
<td><input type="text" name="department[]" size="50"></td>
<td><input type="text" name="positions[]" size="40"></td>
<td><input type="text" name="duration[]"></td>
</tr>
While validating in CI I did the following:
$organization = $this->input->post('organization');
$department = $this->input->post('department');
$positions = $this->input->post('positions');
$duration = $this->input->post('duration');
//printr($organization);
for($i = 0; $i < count($organization); $i++)
{
$org = $organization[$i];
$dept = $department[$i];
$pos = $positions[$i];
$dura = $duration[$i];
$this->form_validation->set_rules($org, "Organization", "trim|xss_clean|max_length[1]");
$this->form_validation->set_rules($dept, "Department", "trim|xss_clean|max_length[50]");
$this->form_validation->set_rules($pos, "Position", "trim|xss_clean|max_length[40]");
$this->form_validation->set_rules($dura, "Duration", "trim|xss_clean|integer");
}
And displayed error as:
<?php
echo form_error("organization[]");
echo form_error("department[]");
echo form_error("positions[]");
echo form_error("duration[]");
?>
Now the problem is it doesn't validate the duration as integer. Even if I put some random alpha characters it doesn't show errors.
When I validate as follows:
$this->form_validation->set_rules('organization[]', "Organization", "trim|xss_clean|max_length[50]");
$this->form_validation->set_rules('department[]', "Department", "trim|xss_clean|max_length[50]");
$this->form_validation->set_rules('positions[]', "Position", "trim|xss_clean|max_length[40]");
$this->form_validation->set_rules('duration[]',"Duration", "trim|xss_clean|numeric");
It doesn't let me submit the form as it takes duration as mandatory which it isn't.
How do I solve it?
any help/suggestions are welcome. thanks.

Answer 1

It doesn't let me submit the form If so, It sounds like a bug.
Temporarily, you can check whether duration[] array is empty or not:
if (! empty($_POST['duration'])) {
$this->form_validation->set_rules('duration[]',"Duration", "trim|xss_clean|numeric");
}
I'll update my answer if I found the main solution.
Update:
This is a bug as I expected, I opened a PR at CodeIgniter Repository, that would fix this issue.

Answer 2

So as suggested by # Hashem Qolami I did the following changes in my code and it worked.
$organization = $this->input->post('organization');
$department = $this->input->post('department');
$positions = $this->input->post('positions');
$duration = $this->input->post('duration');
foreach($organization as $ind=>$val)
{
$org = $organization[$ind];
$dept = $department[$ind];
$pos = $positions[$ind];
$dura = $duration[$ind];
$this->form_validation->set_rules("organization[".$ind."]", "Organization", "trim|xss_clean|max_length[1]");
$this->form_validation->set_rules("department[".$ind."]", "Department", "trim|xss_clean|max_length[50]");
$this->form_validation->set_rules("positions[".$ind."]", "Position", "trim|xss_clean|max_length[40]");
if(!empty($dura))
$this->form_validation->set_rules("duration[".$ind."]", "Duration", "trim|xss_clean|integer");
}
and displayed my errors as follows
for($i = 0; $i < count($organization); $i++) {
echo form_error("organization[".$i."]");
echo form_error("department[".$i."]");
echo form_error("positions[".$i."]");
echo form_error("duration[".$i."]");
}