Codeigniter: Array Submission Validation - php

Question

I am having a problem on validating using empty() on codeigniter.
It seemed that it always returns true, empty or not.
<input type="text" name="contactname[]" value="<?php echo set_value('contactname[]');?>">
Model:
if(empty($this->input->post('contactname'))) {
return TRUE;
} else {
return FALSE;
}
I really don't know what's the cause of this issue.

Answer 1

try this
$contactname = $this->input->post('contactname')
if(empty($contactname)) {
return TRUE;
} else {
return FALSE;
}

Answer 2

CodeIgniter provides a comprehensive form validation and data prepping class that helps minimize the amount of code you'll write. You can load library like this in your controller or model :
$this->load->library('form_validation');
To set validation rules you will use the set_rules() function like this :
$this->form_validation->set_rules('contactname[]', 'Contact name', 'required');
So you need to update your code with given below code -
$this->load->library('form_validation');
$this->form_validation->set_rules('contactname[]', 'Contact name', 'required');
if ($this->form_validation->run() == FALSE)
{
echo validation_errors();
}
else
{
// wrire you code here after validation run success
}
For for reference see this link -
http://www.codeigniter.com/userguide2/libraries/form_validation.html

Answer 3

try this
$contact_name = $this->input->post('contactname[]');
if($contact_name != null)
{
return TRUE;
} else{
return FALSE;
}

Answer 4

Try this.
if (count($this->input->post('contactname')) > 0)
return TRUE;
} else {
return FALSE;
}