Delete a specific Image from a File

I am currently working on a new project, using Codeigniter, it is my first experience and I do not find great help, I want the user to delete a photo chosen by him from his folder, The controller: '

public function delete()
    {
        delete_files('C:\wamp64\www\uploads\_back');
    }'

A view: '

{imagesback}
                                    <div class="col-sm-2">
                                        {ver}
                                    <img src="{path}" style="width: 100%; height: 100px;">
                                    <p>{name}</p>
                                    <button name="nameimagetodelete" onclick="do_delete('{name}')"></button>
                                    </div>
                                    {/imagesback}

'

and JavaScript '

script type="text/javascript">
    function do_delete(name){
        var r = confirm("You sure?");
        if (r == true) 
        {
            window.location.href = "<?php echo site_url('admin/delete');?>?name="+name;
        }
        else
        {
            x = "Action canceled";
            alert(x);
        }
    }
</script>

'

Thank you in advance!