CodeIgniter form validation, re-populating dynamically added fields

Make a provision of index on each of your form element.

<form action="" method="post">    <input type="text" name="name[1]">    <input type="text" name="name[2]"></form>

So, your JS becomes like,

counter = 3;$('#add').click(function(){    $('form').append('<input type="text" name="name['+counter+']">');    counter++;}

Now, if your validation fails, you have to add condition like:

<form action="" method="post"><?php    if ($this->form_validation->run() == FALSE)    {        foreach($this->input->post('name') as $ind=>$item)        {    ?>        <input type="text" name="name[<?php echo $ind ?>]"                          value="<?=set_value('name[".$ind ."]');?>">    <?php        }    }    else    {    ?>        <input type="text" name="name[1]">        <input type="text" name="name[2]">    <?php    }?></form>

Ok, how I did it:

The Controller

<?php$data['some_data'] = ''; // Some data from the database to send to the viewif($this->form_validation->run() == FALSE){    // Posted?    if($this->input->post())    {        // Merge the submitted data with the current data        $data = array_merge($this->input->post(),$data);    }    // Load the view    $this->load->view('view',$data);}else{    // Code after validation was successfull}

The view

<? if(isset($name)): // Name set? ?>    <? foreach($name as $item): // Loop through all previous posted items ?>        <input type="text" name="name[]" value="<?=set_value('name[]'); // Set it's value with the regular set_value function  ?>">    <? endforeach; ?><? else: ?>    <input type="text" name="name[]"><? endif; ?>

This way it isn't hacky with controller stuff in the view and it works perfectly!

@hsuk, thanks!